Fix undesired delivering of private toot to remote accounts that follow author

app/services/process_mentions_service.rb

@@ -28,7 +28,7 @@ class ProcessMentionsService < BaseService
     status.mentions.each do |mention|
       mentioned_account = mention.account
 
-      next if status.private_visibility? && !mentioned_account.following?(status.account)
+      next if status.private_visibility? && (!mentioned_account.following?(status.account) || !mentioned_account.local?)
 
       if mentioned_account.local?
         NotifyService.new.call(mentioned_account, mention)