New comments added in diff" view are sometimes not shown
Occasionally (but unfortunately not in a way I can reproduce), when I add a new line-comment in the diff view or add a new reply to an existing thread, after clicking "Add comment", the comment is not shown. It shows immediately on the discussion page, but not on the diff page where I added it -- I have to reload the entire page to see the new comment.
Our GitLab instance currently uses version 13.4.4, but I have seen this happen multiple times throughout this year.