Created attachment 341182 [details] thread apply all bt full WebKitGTK 2.20.2 on ArchLinux Happened on Mastodon while idle.
This seems to have been fixed long ago, given that the latest releases are in the 2.38.x series (four years have passed, and I have been using Mastodon during the time). Feel free to reopen if current versions still have this behaviour for you.