Fix limited visibility

app/serializers/rest/status_serializer.rb

@@ -66,8 +66,12 @@ class REST::StatusSerializer < ActiveModel::Serializer
   end
 
   def visibility_ex
+    if object.limited_visibility?
+      'private'
+    else
       object.visibility
     end
+  end
 
   def searchability
     object.compute_searchability