And while it is extremely funny it might also be worth fixing.
Here's a post with a link to the tag (the link itself would be super long): https://cohost.org/Cool-Tests-For-Testing/post/1082361-entire-bee-movie
Steps to reproduce:
Bookmark the tag, navigate away.
Then either search the tag or go to the page tag - the yellow loading button takes forever to load and won't offer to remove the bookmark, only to add it again.
Tested on Firefox for Windows with any add-on that could modify the site disabled.