Stop forwarding remote custom emoji reaction

app/models/emoji_reaction.rb

@@ -35,6 +35,14 @@ class EmojiReaction < ApplicationRecord
   after_destroy :refresh_cache
   after_destroy :invalidate_cleanup_info
 
+  def custom_emoji?
+    custom_emoji.present?
+  end
+
+  def remote_custom_emoji?
+    custom_emoji? && !custom_emoji.local?
+  end
+
   private
 
   def refresh_cache

app/services/emoji_react_service.rb

@@ -57,6 +57,7 @@ class EmojiReactService < BaseService
     status = emoji_reaction.status
 
     return unless status.account.local?
+    return if emoji_reaction.remote_custom_emoji?
 
     ActivityPub::RawDistributionWorker.perform_async(build_json(emoji_reaction), status.account_id)
   end