diff --git a/CHANGELOG.md b/CHANGELOG.md
index c7b0f64146..4dd4783597 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,29 @@
 
 All notable changes to this project will be documented in this file.
 
+## [4.3.7] - 2025-04-02
+
+### Add
+
+- Add delay to profile updates to debounce them (#34137 by @ClearlyClaire)
+- Add support for paginating partial collections in `SynchronizeFollowersService` (#34272 and #34277 by @ClearlyClaire)
+
+### Changed
+
+- Change account suspensions to be federated to recently-followed accounts as well (#34294 by @ClearlyClaire)
+- Change `AccountReachFinder` to consider statuses based on suspension date (#32805 and #34291 by @ClearlyClaire and @mjankowski)
+- Change user archive signed URL TTL from 10 seconds to 1 hour (#34254 by @ClearlyClaire)
+
+### Fixed
+
+- Fix static version of animated PNG emojis not being properly extracted (#34337 by @ClearlyClaire)
+- Fix filters not applying in detailed view, favourites and bookmarks (#34259 and #34260 by @ClearlyClaire)
+- Fix handling of malformed/unusual HTML (#34201 by @ClearlyClaire)
+- Fix `CacheBuster` being queued for missing media attachments (#34253 by @ClearlyClaire)
+- Fix incorrect URL being used when cache busting (#34189 by @ClearlyClaire)
+- Fix streaming server refusing unix socket path in `DATABASE_URL` (#34091 by @ClearlyClaire)
+- Fix “x” hotkey not working on boosted filtered posts (#33758 by @ClearlyClaire)
+
 ## [4.3.6] - 2025-03-13
 
 ### Security
diff --git a/app/controllers/api/v1/accounts/credentials_controller.rb b/app/controllers/api/v1/accounts/credentials_controller.rb
index 032e42e9d2..bdd7732b87 100644
--- a/app/controllers/api/v1/accounts/credentials_controller.rb
+++ b/app/controllers/api/v1/accounts/credentials_controller.rb
@@ -14,7 +14,7 @@ class Api::V1::Accounts::CredentialsController < Api::BaseController
     @account = current_account
     UpdateAccountService.new.call(@account, account_params, raise_error: true)
     current_user.update(user_params) if user_params
-    ActivityPub::UpdateDistributionWorker.perform_async(@account.id)
+    ActivityPub::UpdateDistributionWorker.perform_in(ActivityPub::UpdateDistributionWorker::DEBOUNCE_DELAY, @account.id)
     render json: @account, serializer: REST::CredentialAccountSerializer
   rescue ActiveRecord::RecordInvalid => e
     render json: ValidationErrorFormatter.new(e).as_json, status: 422
diff --git a/app/controllers/api/v1/profile/avatars_controller.rb b/app/controllers/api/v1/profile/avatars_controller.rb
index bc4d01a597..e6c954ed63 100644
--- a/app/controllers/api/v1/profile/avatars_controller.rb
+++ b/app/controllers/api/v1/profile/avatars_controller.rb
@@ -7,7 +7,7 @@ class Api::V1::Profile::AvatarsController < Api::BaseController
   def destroy
     @account = current_account
     UpdateAccountService.new.call(@account, { avatar: nil }, raise_error: true)
-    ActivityPub::UpdateDistributionWorker.perform_async(@account.id)
+    ActivityPub::UpdateDistributionWorker.perform_in(ActivityPub::UpdateDistributionWorker::DEBOUNCE_DELAY, @account.id)
     render json: @account, serializer: REST::CredentialAccountSerializer
   end
 end
diff --git a/app/controllers/api/v1/profile/headers_controller.rb b/app/controllers/api/v1/profile/headers_controller.rb
index 9f4daa2f77..4472a01b05 100644
--- a/app/controllers/api/v1/profile/headers_controller.rb
+++ b/app/controllers/api/v1/profile/headers_controller.rb
@@ -7,7 +7,7 @@ class Api::V1::Profile::HeadersController < Api::BaseController
   def destroy
     @account = current_account
     UpdateAccountService.new.call(@account, { header: nil }, raise_error: true)
-    ActivityPub::UpdateDistributionWorker.perform_async(@account.id)
+    ActivityPub::UpdateDistributionWorker.perform_in(ActivityPub::UpdateDistributionWorker::DEBOUNCE_DELAY, @account.id)
     render json: @account, serializer: REST::CredentialAccountSerializer
   end
 end
diff --git a/app/controllers/backups_controller.rb b/app/controllers/backups_controller.rb
index 5df1af5f2f..076d19874b 100644
--- a/app/controllers/backups_controller.rb
+++ b/app/controllers/backups_controller.rb
@@ -9,13 +9,15 @@ class BackupsController < ApplicationController
   before_action :authenticate_user!
   before_action :set_backup
 
+  BACKUP_LINK_TIMEOUT = 1.hour.freeze
+
   def download
     case Paperclip::Attachment.default_options[:storage]
     when :s3, :azure
-      redirect_to @backup.dump.expiring_url(10), allow_other_host: true
+      redirect_to @backup.dump.expiring_url(BACKUP_LINK_TIMEOUT.to_i), allow_other_host: true
     when :fog
       if Paperclip::Attachment.default_options.dig(:fog_credentials, :openstack_temp_url_key).present?
-        redirect_to @backup.dump.expiring_url(Time.now.utc + 10), allow_other_host: true
+        redirect_to @backup.dump.expiring_url(BACKUP_LINK_TIMEOUT.from_now), allow_other_host: true
       else
         redirect_to full_asset_url(@backup.dump.url), allow_other_host: true
       end
diff --git a/app/controllers/settings/pictures_controller.rb b/app/controllers/settings/pictures_controller.rb
index 58a4325307..7e61e6d580 100644
--- a/app/controllers/settings/pictures_controller.rb
+++ b/app/controllers/settings/pictures_controller.rb
@@ -8,7 +8,7 @@ module Settings
     def destroy
       if valid_picture?
         if UpdateAccountService.new.call(@account, { @picture => nil, "#{@picture}_remote_url" => '' })
-          ActivityPub::UpdateDistributionWorker.perform_async(@account.id)
+          ActivityPub::UpdateDistributionWorker.perform_in(ActivityPub::UpdateDistributionWorker::DEBOUNCE_DELAY, @account.id)
           redirect_to settings_profile_path, notice: I18n.t('generic.changes_saved_msg'), status: 303
         else
           redirect_to settings_profile_path
diff --git a/app/controllers/settings/privacy_controller.rb b/app/controllers/settings/privacy_controller.rb
index a5bb3b884f..96efa03ccf 100644
--- a/app/controllers/settings/privacy_controller.rb
+++ b/app/controllers/settings/privacy_controller.rb
@@ -8,7 +8,7 @@ class Settings::PrivacyController < Settings::BaseController
   def update
     if UpdateAccountService.new.call(@account, account_params.except(:settings))
       current_user.update!(settings_attributes: account_params[:settings])
-      ActivityPub::UpdateDistributionWorker.perform_async(@account.id)
+      ActivityPub::UpdateDistributionWorker.perform_in(ActivityPub::UpdateDistributionWorker::DEBOUNCE_DELAY, @account.id)
       redirect_to settings_privacy_path, notice: I18n.t('generic.changes_saved_msg')
     else
       render :show
diff --git a/app/controllers/settings/privacy_extra_controller.rb b/app/controllers/settings/privacy_extra_controller.rb
index f1292e644c..cb99c390dd 100644
--- a/app/controllers/settings/privacy_extra_controller.rb
+++ b/app/controllers/settings/privacy_extra_controller.rb
@@ -8,7 +8,7 @@ class Settings::PrivacyExtraController < Settings::BaseController
   def update
     if UpdateAccountService.new.call(@account, account_params.except(:settings))
       current_user.update!(settings_attributes: account_params[:settings])
-      ActivityPub::UpdateDistributionWorker.perform_async(@account.id)
+      ActivityPub::UpdateDistributionWorker.perform_in(ActivityPub::UpdateDistributionWorker::DEBOUNCE_DELAY, @account.id)
       redirect_to settings_privacy_extra_path, notice: I18n.t('generic.changes_saved_msg')
     else
       render :show
diff --git a/app/controllers/settings/profiles_controller.rb b/app/controllers/settings/profiles_controller.rb
index 99a647336a..04a10fbfb9 100644
--- a/app/controllers/settings/profiles_controller.rb
+++ b/app/controllers/settings/profiles_controller.rb
@@ -9,7 +9,7 @@ class Settings::ProfilesController < Settings::BaseController
 
   def update
     if UpdateAccountService.new.call(@account, account_params)
-      ActivityPub::UpdateDistributionWorker.perform_async(@account.id)
+      ActivityPub::UpdateDistributionWorker.perform_in(ActivityPub::UpdateDistributionWorker::DEBOUNCE_DELAY, @account.id)
       redirect_to settings_profile_path, notice: I18n.t('generic.changes_saved_msg')
     else
       @account.build_fields
diff --git a/app/controllers/settings/verifications_controller.rb b/app/controllers/settings/verifications_controller.rb
index bed29dbeec..4b949ca72d 100644
--- a/app/controllers/settings/verifications_controller.rb
+++ b/app/controllers/settings/verifications_controller.rb
@@ -8,7 +8,7 @@ class Settings::VerificationsController < Settings::BaseController
 
   def update
     if UpdateAccountService.new.call(@account, account_params)
-      ActivityPub::UpdateDistributionWorker.perform_async(@account.id)
+      ActivityPub::UpdateDistributionWorker.perform_in(ActivityPub::UpdateDistributionWorker::DEBOUNCE_DELAY, @account.id)
       redirect_to settings_verification_path, notice: I18n.t('generic.changes_saved_msg')
     else
       render :show
diff --git a/app/helpers/admin/trends/statuses_helper.rb b/app/helpers/admin/trends/statuses_helper.rb
index c7a59660cf..33da1f7216 100644
--- a/app/helpers/admin/trends/statuses_helper.rb
+++ b/app/helpers/admin/trends/statuses_helper.rb
@@ -2,11 +2,18 @@
 
 module Admin::Trends::StatusesHelper
   def one_line_preview(status)
-    text = if status.local?
-             status.text.split("\n").first
-           else
-             Nokogiri::HTML5(status.text).css('html > body > *').first&.text
-           end
+    text = begin
+      if status.local?
+        status.text.split("\n").first
+      else
+        Nokogiri::HTML5(status.text).css('html > body > *').first&.text
+      end
+    rescue ArgumentError
+      # This can happen if one of the Nokogumbo limits is encountered
+      # Unfortunately, it does not use a more precise error class
+      # nor allows more graceful handling
+      ''
+    end
 
     return '' if text.blank?
 
diff --git a/app/javascript/mastodon/features/bookmarked_statuses/index.jsx b/app/javascript/mastodon/features/bookmarked_statuses/index.jsx
index 93be1c6b2e..284342d4ee 100644
--- a/app/javascript/mastodon/features/bookmarked_statuses/index.jsx
+++ b/app/javascript/mastodon/features/bookmarked_statuses/index.jsx
@@ -101,6 +101,7 @@ class Bookmarks extends ImmutablePureComponent {
           onLoadMore={this.handleLoadMore}
           emptyMessage={emptyMessage}
           bindToDocument={!multiColumn}
+          timelineId='bookmarks'
         />
 
         <Helmet>
diff --git a/app/javascript/mastodon/features/favourited_statuses/index.jsx b/app/javascript/mastodon/features/favourited_statuses/index.jsx
index f7d6d14178..9049a20f05 100644
--- a/app/javascript/mastodon/features/favourited_statuses/index.jsx
+++ b/app/javascript/mastodon/features/favourited_statuses/index.jsx
@@ -101,6 +101,7 @@ class Favourites extends ImmutablePureComponent {
           onLoadMore={this.handleLoadMore}
           emptyMessage={emptyMessage}
           bindToDocument={!multiColumn}
+          timelineId='favourites'
         />
 
         <Helmet>
diff --git a/app/javascript/mastodon/features/status/components/detailed_status.tsx b/app/javascript/mastodon/features/status/components/detailed_status.tsx
index c8f082156e..47d1692804 100644
--- a/app/javascript/mastodon/features/status/components/detailed_status.tsx
+++ b/app/javascript/mastodon/features/status/components/detailed_status.tsx
@@ -15,6 +15,7 @@ import AlternateEmailIcon from '@/material-icons/400-24px/alternate_email.svg?re
 import { AnimatedNumber } from 'mastodon/components/animated_number';
 import { ContentWarning } from 'mastodon/components/content_warning';
 import EditedTimestamp from 'mastodon/components/edited_timestamp';
+import { FilterWarning } from 'mastodon/components/filter_warning';
 import type { StatusLike } from 'mastodon/components/hashtag_bar';
 import { getHashtagBarForStatus } from 'mastodon/components/hashtag_bar';
 import { Icon } from 'mastodon/components/icon';
@@ -80,6 +81,7 @@ export const DetailedStatus: React.FC<{
 }) => {
   const properStatus = status?.get('reblog') ?? status;
   const [height, setHeight] = useState(0);
+  const [showDespiteFilter, setShowDespiteFilter] = useState(false);
   const nodeRef = useRef<HTMLDivElement>();
 
   const handleOpenVideo = useCallback(
@@ -92,6 +94,10 @@ export const DetailedStatus: React.FC<{
     [onOpenVideo, status],
   );
 
+  const handleFilterToggle = useCallback(() => {
+    setShowDespiteFilter(!showDespiteFilter);
+  }, [showDespiteFilter, setShowDespiteFilter]);
+
   const handleExpandedToggle = useCallback(() => {
     if (onToggleHidden) onToggleHidden(status);
   }, [onToggleHidden, status]);
@@ -369,8 +375,12 @@ export const DetailedStatus: React.FC<{
   const { statusContentProps, hashtagBar } = getHashtagBarForStatus(
     status as StatusLike,
   );
+
+  const matchedFilters = status.get('matched_filters');
+
   const expanded =
-    !status.get('hidden') || status.get('spoiler_text').length === 0;
+    (!matchedFilters || showDespiteFilter) &&
+    (!status.get('hidden') || status.get('spoiler_text').length === 0);
 
   const quote = !muted && status.get('quote_id') && (
     <>
@@ -418,17 +428,26 @@ export const DetailedStatus: React.FC<{
           )}
         </Link>
 
-        {status.get('spoiler_text').length > 0 && (
-          <ContentWarning
-            text={
-              status.getIn(['translation', 'spoilerHtml']) ||
-              status.get('spoilerHtml')
-            }
-            expanded={expanded}
-            onClick={handleExpandedToggle}
+        {matchedFilters && (
+          <FilterWarning
+            title={matchedFilters.join(', ')}
+            expanded={showDespiteFilter}
+            onClick={handleFilterToggle}
           />
         )}
 
+        {status.get('spoiler_text').length > 0 &&
+          (!matchedFilters || showDespiteFilter) && (
+            <ContentWarning
+              text={
+                status.getIn(['translation', 'spoilerHtml']) ||
+                status.get('spoilerHtml')
+              }
+              expanded={expanded}
+              onClick={handleExpandedToggle}
+            />
+          )}
+
         {expanded && (
           <>
             <StatusContent
diff --git a/app/javascript/mastodon/features/status/index.jsx b/app/javascript/mastodon/features/status/index.jsx
index 08a2a74e88..e9d0c9f8d6 100644
--- a/app/javascript/mastodon/features/status/index.jsx
+++ b/app/javascript/mastodon/features/status/index.jsx
@@ -147,7 +147,7 @@ const makeMapStateToProps = () => {
   });
 
   const mapStateToProps = (state, props) => {
-    const status = getStatus(state, { id: props.params.statusId });
+    const status = getStatus(state, { id: props.params.statusId, contextType: 'detailed' });
 
     let ancestorsIds   = ImmutableList();
     let descendantsIds = ImmutableList();
diff --git a/app/javascript/mastodon/selectors/index.js b/app/javascript/mastodon/selectors/index.js
index 85773152f2..c96309bb6a 100644
--- a/app/javascript/mastodon/selectors/index.js
+++ b/app/javascript/mastodon/selectors/index.js
@@ -17,9 +17,10 @@ export const makeGetStatus = () => {
       (state, { id }) => state.getIn(['accounts', state.getIn(['statuses', id, 'account'])]),
       (state, { id }) => state.getIn(['accounts', state.getIn(['statuses', state.getIn(['statuses', id, 'reblog']), 'account'])]),
       getFilters,
+      (_, { contextType }) => ['detailed', 'bookmarks', 'favourites'].includes(contextType),
     ],
 
-    (statusBase, statusReblog, statusQuote, statusReblogQuote, accountBase, accountReblog, filters) => {
+    (statusBase, statusReblog, statusQuote, statusReblogQuote, accountBase, accountReblog, filters, warnInsteadOfHide) => {
       if (!statusBase || statusBase.get('isLoading')) {
         return null;
       }
@@ -46,7 +47,7 @@ export const makeGetStatus = () => {
           }
         }
 
-        if (filterResults.some((result) => filters.getIn([result.get('filter'), 'filter_action']) === 'hide')) {
+        if (!warnInsteadOfHide && filterResults.some((result) => filters.getIn([result.get('filter'), 'filter_action']) === 'hide')) {
           return null;
         }
         filterResults = filterResults.filter(result => filters.has(result.get('filter')));
diff --git a/app/javascript/mastodon/utils/filters.ts b/app/javascript/mastodon/utils/filters.ts
index 5d334fe509..479e1f44ab 100644
--- a/app/javascript/mastodon/utils/filters.ts
+++ b/app/javascript/mastodon/utils/filters.ts
@@ -7,6 +7,11 @@ export const toServerSideType = (columnType: string) => {
     case 'account':
     case 'explore':
       return columnType;
+    case 'detailed':
+      return 'thread';
+    case 'bookmarks':
+    case 'favourites':
+      return 'home';
     default:
       if (columnType.includes('list:') || columnType.includes('antenna:')) {
         return 'home';
diff --git a/app/lib/account_reach_finder.rb b/app/lib/account_reach_finder.rb
index 19464024a6..4bf5c229a5 100644
--- a/app/lib/account_reach_finder.rb
+++ b/app/lib/account_reach_finder.rb
@@ -10,7 +10,7 @@ class AccountReachFinder
   end
 
   def inboxes
-    (followers_inboxes + reporters_inboxes + recently_mentioned_inboxes + relay_inboxes).uniq
+    (followers_inboxes + reporters_inboxes + recently_mentioned_inboxes + recently_followed_inboxes + recently_requested_inboxes + relay_inboxes).uniq
   end
 
   private
@@ -31,13 +31,32 @@ class AccountReachFinder
       .take(RECENT_LIMIT)
   end
 
+  def recently_followed_inboxes
+    @account
+      .following
+      .where(follows: { created_at: recent_date_cutoff... })
+      .inboxes
+      .take(RECENT_LIMIT)
+  end
+
+  def recently_requested_inboxes
+    Account
+      .where(id: @account.follow_requests.where({ created_at: recent_date_cutoff... }).select(:target_account_id))
+      .inboxes
+      .take(RECENT_LIMIT)
+  end
+
   def relay_inboxes
     Relay.enabled.pluck(:inbox_url)
   end
 
   def oldest_status_id
     Mastodon::Snowflake
-      .id_at(STATUS_SINCE.ago, with_random: false)
+      .id_at(recent_date_cutoff, with_random: false)
+  end
+
+  def recent_date_cutoff
+    @account.suspended? && @account.suspension_origin_local? ? @account.suspended_at - STATUS_SINCE : STATUS_SINCE.ago
   end
 
   def recent_statuses
diff --git a/app/lib/emoji_formatter.rb b/app/lib/emoji_formatter.rb
index c0302767ef..1574d4588d 100644
--- a/app/lib/emoji_formatter.rb
+++ b/app/lib/emoji_formatter.rb
@@ -24,7 +24,15 @@ class EmojiFormatter
   def to_s
     return html if custom_emojis.empty? || html.blank?
 
-    tree = Nokogiri::HTML5.fragment(html)
+    begin
+      tree = Nokogiri::HTML5.fragment(html)
+    rescue ArgumentError
+      # This can happen if one of the Nokogumbo limits is encountered
+      # Unfortunately, it does not use a more precise error class
+      # nor allows more graceful handling
+      return ''
+    end
+
     tree.xpath('./text()|.//text()[not(ancestor[@class="invisible"])]').to_a.each do |node|
       i                     = -1
       inside_shortname      = false
diff --git a/app/lib/plain_text_formatter.rb b/app/lib/plain_text_formatter.rb
index f960ba7acc..e8ff79806f 100644
--- a/app/lib/plain_text_formatter.rb
+++ b/app/lib/plain_text_formatter.rb
@@ -16,7 +16,15 @@ class PlainTextFormatter
     if local?
       text
     else
-      node = Nokogiri::HTML5.fragment(insert_newlines)
+      begin
+        node = Nokogiri::HTML5.fragment(insert_newlines)
+      rescue ArgumentError
+        # This can happen if one of the Nokogumbo limits is encountered
+        # Unfortunately, it does not use a more precise error class
+        # nor allows more graceful handling
+        return ''
+      end
+
       # Elements that are entirely removed with our Sanitize config
       node.xpath('.//iframe|.//math|.//noembed|.//noframes|.//noscript|.//plaintext|.//script|.//style|.//svg|.//xmp').remove
       node.text.chomp
diff --git a/app/models/account.rb b/app/models/account.rb
index 0612e63fd5..f3f591d006 100644
--- a/app/models/account.rb
+++ b/app/models/account.rb
@@ -160,7 +160,7 @@ class Account < ApplicationRecord
   scope :not_excluded_by_account, ->(account) { where.not(id: account.excluded_from_timeline_account_ids) }
   scope :not_domain_blocked_by_account, ->(account) { where(arel_table[:domain].eq(nil).or(arel_table[:domain].not_in(account.excluded_from_timeline_domains))) }
   scope :dormant, -> { joins(:account_stat).merge(AccountStat.without_recent_activity) }
-  scope :with_username, ->(value) { where arel_table[:username].lower.eq(value.to_s.downcase) }
+  scope :with_username, ->(value) { value.is_a?(Array) ? where(arel_table[:username].lower.in(value.map { |x| x.to_s.downcase })) : where(arel_table[:username].lower.eq(value.to_s.downcase)) }
   scope :with_domain, ->(value) { where arel_table[:domain].lower.eq(value&.to_s&.downcase) }
   scope :without_memorial, -> { where(memorial: false) }
   scope :duplicate_uris, -> { select(:uri, Arel.star.count).group(:uri).having(Arel.star.count.gt(1)) }
diff --git a/app/models/account/field.rb b/app/models/account/field.rb
index bcd89015de..4b3ccea9c4 100644
--- a/app/models/account/field.rb
+++ b/app/models/account/field.rb
@@ -73,7 +73,14 @@ class Account::Field < ActiveModelSerializers::Model
   end
 
   def extract_url_from_html
-    doc = Nokogiri::HTML5.fragment(value)
+    begin
+      doc = Nokogiri::HTML5.fragment(value)
+    rescue ArgumentError
+      # This can happen if one of the Nokogumbo limits is encountered
+      # Unfortunately, it does not use a more precise error class
+      # nor allows more graceful handling
+      return
+    end
 
     return if doc.nil?
     return if doc.children.size != 1
diff --git a/app/models/media_attachment.rb b/app/models/media_attachment.rb
index 49ff740884..3eaa978c27 100644
--- a/app/models/media_attachment.rb
+++ b/app/models/media_attachment.rb
@@ -425,8 +425,10 @@ class MediaAttachment < ApplicationRecord
 
     @paths_to_cache_bust = MediaAttachment.attachment_definitions.keys.flat_map do |attachment_name|
       attachment = public_send(attachment_name)
+      next if attachment.blank?
+
       styles = DEFAULT_STYLES | attachment.styles.keys
-      styles.map { |style| attachment.path(style) }
+      styles.map { |style| attachment.url(style) }
     end.compact
   rescue => e
     # We really don't want any error here preventing media deletion
diff --git a/app/services/activitypub/synchronize_followers_service.rb b/app/services/activitypub/synchronize_followers_service.rb
index f51d671a00..82d84a2f21 100644
--- a/app/services/activitypub/synchronize_followers_service.rb
+++ b/app/services/activitypub/synchronize_followers_service.rb
@@ -4,32 +4,46 @@ class ActivityPub::SynchronizeFollowersService < BaseService
   include JsonLdHelper
   include Payloadable
 
+  MAX_COLLECTION_PAGES = 10
+
   def call(account, partial_collection_url)
     @account = account
+    @expected_followers_ids = []
 
-    items = collection_items(partial_collection_url)
-    return if items.nil?
-
-    # There could be unresolved accounts (hence the call to .compact) but this
-    # should never happen in practice, since in almost all cases we keep an
-    # Account record, and should we not do that, we should have sent a Delete.
-    # In any case there is not much we can do if that occurs.
-    @expected_followers = items.filter_map { |uri| ActivityPub::TagManager.instance.uri_to_resource(uri, Account) }
+    return unless process_collection!(partial_collection_url)
 
     remove_unexpected_local_followers!
-    handle_unexpected_outgoing_follows!
   end
 
   private
 
+  def process_page!(items)
+    page_expected_followers = extract_local_followers(items)
+    @expected_followers_ids.concat(page_expected_followers.pluck(:id))
+
+    handle_unexpected_outgoing_follows!(page_expected_followers)
+  end
+
+  def extract_local_followers(items)
+    # There could be unresolved accounts (hence the call to .filter_map) but this
+    # should never happen in practice, since in almost all cases we keep an
+    # Account record, and should we not do that, we should have sent a Delete.
+    # In any case there is not much we can do if that occurs.
+
+    # TODO: this will need changes when switching to numeric IDs
+
+    usernames = items.filter_map { |uri| ActivityPub::TagManager.instance.uri_to_local_id(uri, :username)&.downcase }
+    Account.local.with_username(usernames)
+  end
+
   def remove_unexpected_local_followers!
-    @account.followers.local.where.not(id: @expected_followers.map(&:id)).reorder(nil).find_each do |unexpected_follower|
+    @account.followers.local.where.not(id: @expected_followers_ids).reorder(nil).find_each do |unexpected_follower|
       UnfollowService.new.call(unexpected_follower, @account)
     end
   end
 
-  def handle_unexpected_outgoing_follows!
-    @expected_followers.each do |expected_follower|
+  def handle_unexpected_outgoing_follows!(expected_followers)
+    expected_followers.each do |expected_follower|
       next if expected_follower.following?(@account)
 
       if expected_follower.requested?(@account)
@@ -50,18 +64,33 @@ class ActivityPub::SynchronizeFollowersService < BaseService
     Oj.dump(serialize_payload(follow, ActivityPub::UndoFollowSerializer))
   end
 
-  def collection_items(collection_or_uri)
-    collection = fetch_collection(collection_or_uri)
-    return unless collection.is_a?(Hash)
+  # Only returns true if the whole collection has been processed
+  def process_collection!(collection_uri, max_pages: MAX_COLLECTION_PAGES)
+    collection = fetch_collection(collection_uri)
+    return false unless collection.is_a?(Hash)
 
     collection = fetch_collection(collection['first']) if collection['first'].present?
-    return unless collection.is_a?(Hash)
 
+    while collection.is_a?(Hash)
+      process_page!(as_array(collection_page_items(collection)))
+
+      max_pages -= 1
+
+      return true if collection['next'].blank? # We reached the end of the collection
+      return false if max_pages <= 0 # We reached our pages limit
+
+      collection = fetch_collection(collection['next'])
+    end
+
+    false
+  end
+
+  def collection_page_items(collection)
     case collection['type']
     when 'Collection', 'CollectionPage'
-      as_array(collection['items'])
+      collection['items']
     when 'OrderedCollection', 'OrderedCollectionPage'
-      as_array(collection['orderedItems'])
+      collection['orderedItems']
     end
   end
 
diff --git a/app/services/suspend_account_service.rb b/app/services/suspend_account_service.rb
index 44210799f9..3934a738f7 100644
--- a/app/services/suspend_account_service.rb
+++ b/app/services/suspend_account_service.rb
@@ -95,7 +95,7 @@ class SuspendAccountService < BaseService
             end
           end
 
-          CacheBusterWorker.perform_async(attachment.path(style)) if Rails.configuration.x.cache_buster_enabled
+          CacheBusterWorker.perform_async(attachment.url(style)) if Rails.configuration.x.cache_buster_enabled
         end
       end
     end
diff --git a/app/services/unsuspend_account_service.rb b/app/services/unsuspend_account_service.rb
index 652dd6a845..7d3bb806a6 100644
--- a/app/services/unsuspend_account_service.rb
+++ b/app/services/unsuspend_account_service.rb
@@ -91,7 +91,7 @@ class UnsuspendAccountService < BaseService
             end
           end
 
-          CacheBusterWorker.perform_async(attachment.path(style)) if Rails.configuration.x.cache_buster_enabled
+          CacheBusterWorker.perform_async(attachment.url(style)) if Rails.configuration.x.cache_buster_enabled
         end
       end
     end
diff --git a/app/workers/activitypub/update_distribution_worker.rb b/app/workers/activitypub/update_distribution_worker.rb
index a04ac621f3..9a418f0f3d 100644
--- a/app/workers/activitypub/update_distribution_worker.rb
+++ b/app/workers/activitypub/update_distribution_worker.rb
@@ -1,6 +1,8 @@
 # frozen_string_literal: true
 
 class ActivityPub::UpdateDistributionWorker < ActivityPub::RawDistributionWorker
+  DEBOUNCE_DELAY = 5.seconds
+
   sidekiq_options queue: 'push', lock: :until_executed, lock_ttl: 1.day.to_i
 
   # Distribute an profile update to servers that might have a copy
diff --git a/docker-compose.yml b/docker-compose.yml
index 56c734318e..143929d902 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -59,7 +59,7 @@ services:
   web:
     # You can uncomment the following line if you want to not use the prebuilt image, for example if you have local code changes
     build: .
-    image: kmyblue:17.3
+    image: kmyblue:17.4
     restart: always
     env_file: .env.production
     command: bundle exec puma -C config/puma.rb
@@ -83,7 +83,7 @@ services:
     build:
       dockerfile: ./streaming/Dockerfile
       context: .
-    image: kmyblue-streaming:17.3
+    image: kmyblue-streaming:17.4
     restart: always
     env_file: .env.production
     command: node ./streaming/index.js
@@ -101,7 +101,7 @@ services:
 
   sidekiq:
     build: .
-    image: kmyblue:17.3
+    image: kmyblue:17.4
     restart: always
     env_file: .env.production
     command: bundle exec sidekiq
diff --git a/lib/mastodon/version.rb b/lib/mastodon/version.rb
index d523a1ef84..d0366d5d14 100644
--- a/lib/mastodon/version.rb
+++ b/lib/mastodon/version.rb
@@ -13,7 +13,7 @@ module Mastodon
     end
 
     def kmyblue_minor
-      3
+      4
     end
 
     def kmyblue_flag
diff --git a/lib/paperclip/vips_lazy_thumbnail.rb b/lib/paperclip/vips_lazy_thumbnail.rb
index fea4b86064..528d5604dc 100644
--- a/lib/paperclip/vips_lazy_thumbnail.rb
+++ b/lib/paperclip/vips_lazy_thumbnail.rb
@@ -123,7 +123,14 @@ module Paperclip
     end
 
     def needs_convert?
-      needs_different_geometry? || needs_different_format? || needs_metadata_stripping?
+      strip_animations? || needs_different_geometry? || needs_different_format? || needs_metadata_stripping?
+    end
+
+    def strip_animations?
+      # Detecting whether the source image is animated across all our supported
+      # input file formats is not trivial, and converting unconditionally is just
+      # as simple for now
+      options[:style] == :static
     end
 
     def needs_different_geometry?
diff --git a/spec/controllers/settings/privacy_controller_spec.rb b/spec/controllers/settings/privacy_controller_spec.rb
index 59fd342199..b09f700081 100644
--- a/spec/controllers/settings/privacy_controller_spec.rb
+++ b/spec/controllers/settings/privacy_controller_spec.rb
@@ -31,7 +31,7 @@ RSpec.describe Settings::PrivacyController do
   describe 'PUT #update' do
     context 'when update succeeds' do
       before do
-        allow(ActivityPub::UpdateDistributionWorker).to receive(:perform_async)
+        allow(ActivityPub::UpdateDistributionWorker).to receive(:perform_in)
       end
 
       it 'updates the user profile' do
@@ -44,14 +44,14 @@ RSpec.describe Settings::PrivacyController do
           .to redirect_to(settings_privacy_path)
 
         expect(ActivityPub::UpdateDistributionWorker)
-          .to have_received(:perform_async).with(account.id)
+          .to have_received(:perform_in).with(ActivityPub::UpdateDistributionWorker::DEBOUNCE_DELAY, account.id)
       end
     end
 
     context 'when update fails' do
       before do
         allow(UpdateAccountService).to receive(:new).and_return(failing_update_service)
-        allow(ActivityPub::UpdateDistributionWorker).to receive(:perform_async)
+        allow(ActivityPub::UpdateDistributionWorker).to receive(:perform_in)
       end
 
       it 'updates the user profile' do
@@ -61,7 +61,7 @@ RSpec.describe Settings::PrivacyController do
           .to render_template(:show)
 
         expect(ActivityPub::UpdateDistributionWorker)
-          .to_not have_received(:perform_async)
+          .to_not have_received(:perform_in)
       end
 
       private
diff --git a/spec/lib/account_reach_finder_spec.rb b/spec/lib/account_reach_finder_spec.rb
index 0c1d92b2da..ed16c07c22 100644
--- a/spec/lib/account_reach_finder_spec.rb
+++ b/spec/lib/account_reach_finder_spec.rb
@@ -13,13 +13,28 @@ RSpec.describe AccountReachFinder do
   let(:ap_mentioned_example_com) { Fabricate(:account, protocol: :activitypub, inbox_url: 'https://example.com/inbox-3', domain: 'example.com') }
   let(:ap_mentioned_example_org) { Fabricate(:account, protocol: :activitypub, inbox_url: 'https://example.org/inbox-4', domain: 'example.org') }
 
+  let(:ap_followed_example_com) { Fabricate(:account, protocol: :activitypub, inbox_url: 'https://example.com/inbox-5', domain: 'example.com') }
+  let(:ap_followed_example_org) { Fabricate(:account, protocol: :activitypub, inbox_url: 'https://example.com/inbox-6', domain: 'example.org') }
+
+  let(:ap_requested_example_com) { Fabricate(:account, protocol: :activitypub, inbox_url: 'https://example.com/inbox-7', domain: 'example.com') }
+  let(:ap_requested_example_org) { Fabricate(:account, protocol: :activitypub, inbox_url: 'https://example.com/inbox-8', domain: 'example.org') }
+
   let(:unrelated_account) { Fabricate(:account, protocol: :activitypub, inbox_url: 'https://example.com/unrelated-inbox', domain: 'example.com') }
+  let(:old_followed_account) { Fabricate(:account, protocol: :activitypub, inbox_url: 'https://example.com/old-followed-inbox', domain: 'example.com') }
 
   before do
+    travel_to(2.months.ago) { account.follow!(old_followed_account) }
+
     ap_follower_example_com.follow!(account)
     ap_follower_example_org.follow!(account)
     ap_follower_with_shared.follow!(account)
 
+    account.follow!(ap_followed_example_com)
+    account.follow!(ap_followed_example_org)
+
+    account.request_follow!(ap_requested_example_com)
+    account.request_follow!(ap_requested_example_org)
+
     Fabricate(:status, account: account).tap do |status|
       status.mentions << Mention.new(account: ap_follower_example_com)
       status.mentions << Mention.new(account: ap_mentioned_with_shared)
@@ -44,7 +59,10 @@ RSpec.describe AccountReachFinder do
       expect(subject)
         .to include(*follower_inbox_urls)
         .and include(*mentioned_account_inbox_urls)
+        .and include(*recently_followed_inbox_urls)
+        .and include(*recently_requested_inbox_urls)
         .and not_include(unrelated_account.preferred_inbox_url)
+        .and not_include(old_followed_account.preferred_inbox_url)
     end
 
     def follower_inbox_urls
@@ -56,5 +74,15 @@ RSpec.describe AccountReachFinder do
       [ap_mentioned_with_shared, ap_mentioned_example_com, ap_mentioned_example_org]
         .map(&:preferred_inbox_url)
     end
+
+    def recently_followed_inbox_urls
+      [ap_followed_example_com, ap_followed_example_org]
+        .map(&:preferred_inbox_url)
+    end
+
+    def recently_requested_inbox_urls
+      [ap_requested_example_com, ap_requested_example_org]
+        .map(&:preferred_inbox_url)
+    end
   end
 end
diff --git a/spec/models/media_attachment_spec.rb b/spec/models/media_attachment_spec.rb
index 5f91ae0967..43e9ed087b 100644
--- a/spec/models/media_attachment_spec.rb
+++ b/spec/models/media_attachment_spec.rb
@@ -295,12 +295,21 @@ RSpec.describe MediaAttachment, :attachment_processing do
     end
 
     it 'queues CacheBusterWorker jobs' do
-      original_path = media.file.path(:original)
-      small_path = media.file.path(:small)
+      original_url = media.file.url(:original)
+      small_url = media.file.url(:small)
 
       expect { media.destroy }
-        .to enqueue_sidekiq_job(CacheBusterWorker).with(original_path)
-        .and enqueue_sidekiq_job(CacheBusterWorker).with(small_path)
+        .to enqueue_sidekiq_job(CacheBusterWorker).with(original_url)
+        .and enqueue_sidekiq_job(CacheBusterWorker).with(small_url)
+    end
+
+    context 'with a missing remote attachment' do
+      let(:media) { Fabricate(:media_attachment, remote_url: 'https://example.com/foo.png', file: nil) }
+
+      it 'does not queue CacheBusterWorker jobs' do
+        expect { media.destroy }
+          .to_not enqueue_sidekiq_job(CacheBusterWorker)
+      end
     end
   end
 
diff --git a/spec/requests/api/v1/accounts/credentials_spec.rb b/spec/requests/api/v1/accounts/credentials_spec.rb
index c92f4c7973..68ea259481 100644
--- a/spec/requests/api/v1/accounts/credentials_spec.rb
+++ b/spec/requests/api/v1/accounts/credentials_spec.rb
@@ -53,8 +53,6 @@ RSpec.describe 'credentials API' do
       patch '/api/v1/accounts/update_credentials', headers: headers, params: params
     end
 
-    before { allow(ActivityPub::UpdateDistributionWorker).to receive(:perform_async) }
-
     let(:params) do
       {
         avatar: fixture_file_upload('avatar.gif', 'image/gif'),
@@ -113,7 +111,7 @@ RSpec.describe 'credentials API' do
       })
 
       expect(ActivityPub::UpdateDistributionWorker)
-        .to have_received(:perform_async).with(user.account_id)
+        .to have_enqueued_sidekiq_job(user.account_id)
     end
 
     def expect_account_updates
diff --git a/spec/requests/api/v1/profiles_spec.rb b/spec/requests/api/v1/profiles_spec.rb
index fd3ab4bf58..de7a20b133 100644
--- a/spec/requests/api/v1/profiles_spec.rb
+++ b/spec/requests/api/v1/profiles_spec.rb
@@ -15,10 +15,6 @@ RSpec.describe 'Deleting profile images' do
   let(:headers) { { 'Authorization' => "Bearer #{token.token}" } }
 
   describe 'DELETE /api/v1/profile' do
-    before do
-      allow(ActivityPub::UpdateDistributionWorker).to receive(:perform_async)
-    end
-
     context 'when deleting an avatar' do
       context 'with wrong scope' do
         before do
@@ -38,7 +34,8 @@ RSpec.describe 'Deleting profile images' do
         account.reload
         expect(account.avatar).to_not exist
         expect(account.header).to exist
-        expect(ActivityPub::UpdateDistributionWorker).to have_received(:perform_async).with(account.id)
+        expect(ActivityPub::UpdateDistributionWorker)
+          .to have_enqueued_sidekiq_job(account.id)
       end
     end
 
@@ -61,7 +58,8 @@ RSpec.describe 'Deleting profile images' do
         account.reload
         expect(account.avatar).to exist
         expect(account.header).to_not exist
-        expect(ActivityPub::UpdateDistributionWorker).to have_received(:perform_async).with(account.id)
+        expect(ActivityPub::UpdateDistributionWorker)
+          .to have_enqueued_sidekiq_job(account.id)
       end
     end
   end
diff --git a/spec/requests/api/v2/notifications_spec.rb b/spec/requests/api/v2/notifications_spec.rb
index a7608e1419..72df063d49 100644
--- a/spec/requests/api/v2/notifications_spec.rb
+++ b/spec/requests/api/v2/notifications_spec.rb
@@ -170,7 +170,7 @@ RSpec.describe 'Notifications' do
       end
 
       context 'with min_id param' do
-        let(:params) { { min_id: user.account.notifications.reload.first.id - 1 } }
+        let(:params) { { min_id: user.account.notifications.order(id: :asc).first.id - 1 } }
 
         it 'returns a notification group covering all notifications' do
           subject
diff --git a/spec/services/activitypub/synchronize_followers_service_spec.rb b/spec/services/activitypub/synchronize_followers_service_spec.rb
index 974368b7d7..70f27627e1 100644
--- a/spec/services/activitypub/synchronize_followers_service_spec.rb
+++ b/spec/services/activitypub/synchronize_followers_service_spec.rb
@@ -10,7 +10,7 @@ RSpec.describe ActivityPub::SynchronizeFollowersService do
   let(:bob)            { Fabricate(:account, username: 'bob') }
   let(:eve)            { Fabricate(:account, username: 'eve') }
   let(:mallory)        { Fabricate(:account, username: 'mallory') }
-  let(:collection_uri) { 'http://example.com/partial-followers' }
+  let(:collection_uri) { 'https://example.com/partial-followers' }
 
   let(:items) do
     [alice, eve, mallory].map do |account|
@@ -27,14 +27,14 @@ RSpec.describe ActivityPub::SynchronizeFollowersService do
     }.with_indifferent_access
   end
 
+  before do
+    alice.follow!(actor)
+    bob.follow!(actor)
+    mallory.request_follow!(actor)
+  end
+
   shared_examples 'synchronizes followers' do
     before do
-      alice.follow!(actor)
-      bob.follow!(actor)
-      mallory.request_follow!(actor)
-
-      allow(ActivityPub::DeliveryWorker).to receive(:perform_async)
-
       subject.call(actor, collection_uri)
     end
 
@@ -46,7 +46,7 @@ RSpec.describe ActivityPub::SynchronizeFollowersService do
       expect(mallory)
         .to be_following(actor) # Convert follow request to follow when accepted
       expect(ActivityPub::DeliveryWorker)
-        .to have_received(:perform_async).with(anything, eve.id, actor.inbox_url) # Send Undo Follow to actor
+        .to have_enqueued_sidekiq_job(anything, eve.id, actor.inbox_url) # Send Undo Follow to actor
     end
   end
 
@@ -76,7 +76,7 @@ RSpec.describe ActivityPub::SynchronizeFollowersService do
       it_behaves_like 'synchronizes followers'
     end
 
-    context 'when the endpoint is a paginated Collection of actor URIs' do
+    context 'when the endpoint is a single-page paginated Collection of actor URIs' do
       let(:payload) do
         {
           '@context': 'https://www.w3.org/ns/activitystreams',
@@ -96,5 +96,106 @@ RSpec.describe ActivityPub::SynchronizeFollowersService do
 
       it_behaves_like 'synchronizes followers'
     end
+
+    context 'when the endpoint is a paginated Collection of actor URIs split across multiple pages' do
+      before do
+        stub_request(:get, 'https://example.com/partial-followers')
+          .to_return(status: 200, headers: { 'Content-Type': 'application/activity+json' }, body: Oj.dump({
+            '@context': 'https://www.w3.org/ns/activitystreams',
+            type: 'Collection',
+            id: 'https://example.com/partial-followers',
+            first: 'https://example.com/partial-followers/1',
+          }))
+
+        stub_request(:get, 'https://example.com/partial-followers/1')
+          .to_return(status: 200, headers: { 'Content-Type': 'application/activity+json' }, body: Oj.dump({
+            '@context': 'https://www.w3.org/ns/activitystreams',
+            type: 'CollectionPage',
+            id: 'https://example.com/partial-followers/1',
+            partOf: 'https://example.com/partial-followers',
+            next: 'https://example.com/partial-followers/2',
+            items: [alice, eve].map { |account| ActivityPub::TagManager.instance.uri_for(account) },
+          }))
+
+        stub_request(:get, 'https://example.com/partial-followers/2')
+          .to_return(status: 200, headers: { 'Content-Type': 'application/activity+json' }, body: Oj.dump({
+            '@context': 'https://www.w3.org/ns/activitystreams',
+            type: 'CollectionPage',
+            id: 'https://example.com/partial-followers/2',
+            partOf: 'https://example.com/partial-followers',
+            items: ActivityPub::TagManager.instance.uri_for(mallory),
+          }))
+      end
+
+      it_behaves_like 'synchronizes followers'
+    end
+
+    context 'when the endpoint is a paginated Collection of actor URIs split across, but one page errors out' do
+      before do
+        stub_request(:get, 'https://example.com/partial-followers')
+          .to_return(status: 200, headers: { 'Content-Type': 'application/activity+json' }, body: Oj.dump({
+            '@context': 'https://www.w3.org/ns/activitystreams',
+            type: 'Collection',
+            id: 'https://example.com/partial-followers',
+            first: 'https://example.com/partial-followers/1',
+          }))
+
+        stub_request(:get, 'https://example.com/partial-followers/1')
+          .to_return(status: 200, headers: { 'Content-Type': 'application/activity+json' }, body: Oj.dump({
+            '@context': 'https://www.w3.org/ns/activitystreams',
+            type: 'CollectionPage',
+            id: 'https://example.com/partial-followers/1',
+            partOf: 'https://example.com/partial-followers',
+            next: 'https://example.com/partial-followers/2',
+            items: [mallory].map { |account| ActivityPub::TagManager.instance.uri_for(account) },
+          }))
+
+        stub_request(:get, 'https://example.com/partial-followers/2')
+          .to_return(status: 404)
+      end
+
+      it 'confirms pending follow request but does not remove extra followers' do
+        previous_follower_ids = actor.followers.pluck(:id)
+
+        subject.call(actor, collection_uri)
+
+        expect(previous_follower_ids - actor.followers.reload.pluck(:id))
+          .to be_empty
+        expect(mallory)
+          .to be_following(actor)
+      end
+    end
+
+    context 'when the endpoint is a paginated Collection of actor URIs with more pages than we allow' do
+      let(:payload) do
+        {
+          '@context': 'https://www.w3.org/ns/activitystreams',
+          type: 'Collection',
+          id: collection_uri,
+          first: {
+            type: 'CollectionPage',
+            partOf: collection_uri,
+            items: items,
+            next: "#{collection_uri}/page2",
+          },
+        }.with_indifferent_access
+      end
+
+      before do
+        stub_const('ActivityPub::SynchronizeFollowersService::MAX_COLLECTION_PAGES', 1)
+        stub_request(:get, collection_uri).to_return(status: 200, body: Oj.dump(payload), headers: { 'Content-Type': 'application/activity+json' })
+      end
+
+      it 'confirms pending follow request but does not remove extra followers' do
+        previous_follower_ids = actor.followers.pluck(:id)
+
+        subject.call(actor, collection_uri)
+
+        expect(previous_follower_ids - actor.followers.reload.pluck(:id))
+          .to be_empty
+        expect(mallory)
+          .to be_following(actor)
+      end
+    end
   end
 end
diff --git a/spec/services/suspend_account_service_spec.rb b/spec/services/suspend_account_service_spec.rb
index 4a2f494e0c..c15c23ca30 100644
--- a/spec/services/suspend_account_service_spec.rb
+++ b/spec/services/suspend_account_service_spec.rb
@@ -2,7 +2,7 @@
 
 require 'rails_helper'
 
-RSpec.describe SuspendAccountService, :inline_jobs do
+RSpec.describe SuspendAccountService do
   shared_examples 'common behavior' do
     subject { described_class.new.call(account) }
 
@@ -11,6 +11,7 @@ RSpec.describe SuspendAccountService, :inline_jobs do
 
     before do
       allow(FeedManager.instance).to receive_messages(unmerge_from_home: nil, unmerge_from_list: nil)
+      allow(Rails.configuration.x).to receive(:cache_buster_enabled).and_return(true)
 
       local_follower.follow!(account)
       list.accounts << account
@@ -23,6 +24,7 @@ RSpec.describe SuspendAccountService, :inline_jobs do
     it 'unmerges from feeds of local followers and changes file mode and preserves suspended flag' do
       expect { subject }
         .to change_file_mode
+        .and enqueue_sidekiq_job(CacheBusterWorker).with(account.media_attachments.first.file.url(:original))
         .and not_change_suspended_flag
       expect(FeedManager.instance).to have_received(:unmerge_from_home).with(account, local_follower)
       expect(FeedManager.instance).to have_received(:unmerge_from_list).with(account, list)
@@ -38,17 +40,12 @@ RSpec.describe SuspendAccountService, :inline_jobs do
   end
 
   describe 'suspending a local account' do
-    def match_update_actor_request(req, account)
-      json = JSON.parse(req.body)
+    def match_update_actor_request(json, account)
+      json = JSON.parse(json)
       actor_id = ActivityPub::TagManager.instance.uri_for(account)
       json['type'] == 'Update' && json['actor'] == actor_id && json['object']['id'] == actor_id && json['object']['suspended']
     end
 
-    before do
-      stub_request(:post, 'https://alice.com/inbox').to_return(status: 201)
-      stub_request(:post, 'https://bob.com/inbox').to_return(status: 201)
-    end
-
     include_examples 'common behavior' do
       let!(:account)         { Fabricate(:account) }
       let!(:remote_follower) { Fabricate(:account, uri: 'https://alice.com', inbox_url: 'https://alice.com/inbox', protocol: :activitypub, domain: 'alice.com') }
@@ -61,22 +58,20 @@ RSpec.describe SuspendAccountService, :inline_jobs do
 
       it 'sends an Update actor activity to followers and reporters' do
         subject
-        expect(a_request(:post, remote_follower.inbox_url).with { |req| match_update_actor_request(req, account) }).to have_been_made.once
-        expect(a_request(:post, remote_reporter.inbox_url).with { |req| match_update_actor_request(req, account) }).to have_been_made.once
+
+        expect(ActivityPub::DeliveryWorker)
+          .to have_enqueued_sidekiq_job(satisfying { |json| match_update_actor_request(json, account) }, account.id, remote_follower.inbox_url).once
+          .and have_enqueued_sidekiq_job(satisfying { |json| match_update_actor_request(json, account) }, account.id, remote_reporter.inbox_url).once
       end
     end
   end
 
   describe 'suspending a remote account' do
-    def match_reject_follow_request(req, account, followee)
-      json = JSON.parse(req.body)
+    def match_reject_follow_request(json, account, followee)
+      json = JSON.parse(json)
       json['type'] == 'Reject' && json['actor'] == ActivityPub::TagManager.instance.uri_for(followee) && json['object']['actor'] == account.uri
     end
 
-    before do
-      stub_request(:post, 'https://bob.com/inbox').to_return(status: 201)
-    end
-
     include_examples 'common behavior' do
       let!(:account)        { Fabricate(:account, domain: 'bob.com', uri: 'https://bob.com', inbox_url: 'https://bob.com/inbox', protocol: :activitypub) }
       let!(:local_followee) { Fabricate(:account) }
@@ -88,7 +83,8 @@ RSpec.describe SuspendAccountService, :inline_jobs do
       it 'sends a Reject Follow activity', :aggregate_failures do
         subject
 
-        expect(a_request(:post, account.inbox_url).with { |req| match_reject_follow_request(req, account, local_followee) }).to have_been_made.once
+        expect(ActivityPub::DeliveryWorker)
+          .to have_enqueued_sidekiq_job(satisfying { |json| match_reject_follow_request(json, account, local_followee) }, local_followee.id, account.inbox_url).once
       end
     end
   end
diff --git a/spec/system/settings/profiles_spec.rb b/spec/system/settings/profiles_spec.rb
index 73a5751141..f0fdbdb203 100644
--- a/spec/system/settings/profiles_spec.rb
+++ b/spec/system/settings/profiles_spec.rb
@@ -7,7 +7,6 @@ RSpec.describe 'Settings profile page' do
   let(:account) { user.account }
 
   before do
-    allow(ActivityPub::UpdateDistributionWorker).to receive(:perform_async)
     sign_in user
   end
 
@@ -24,7 +23,7 @@ RSpec.describe 'Settings profile page' do
       .to change { account.reload.display_name }.to('New name')
       .and(change { account.reload.avatar.instance.avatar_file_name }.from(nil).to(be_present))
     expect(ActivityPub::UpdateDistributionWorker)
-      .to have_received(:perform_async).with(account.id)
+      .to have_enqueued_sidekiq_job(account.id)
   end
 
   def display_name_field
diff --git a/streaming/database.js b/streaming/database.js
index 60a3b34ef0..553c9149cc 100644
--- a/streaming/database.js
+++ b/streaming/database.js
@@ -49,7 +49,7 @@ export function configFromEnv(env, environment) {
     if (typeof parsedUrl.password === 'string') baseConfig.password = parsedUrl.password;
     if (typeof parsedUrl.host === 'string') baseConfig.host = parsedUrl.host;
     if (typeof parsedUrl.user === 'string') baseConfig.user = parsedUrl.user;
-    if (typeof parsedUrl.port === 'string') {
+    if (typeof parsedUrl.port === 'string' && parsedUrl.port) {
       const parsedPort = parseInt(parsedUrl.port, 10);
       if (isNaN(parsedPort)) {
         throw new Error('Invalid port specified in DATABASE_URL environment variable');