Possible regression in MR code-review discussions

Summary

Discussions for code-review split up in a very weird way, with new comments ending up on an old commit and old comments end up on new commits (that part is really old)

Expected behavior

This is what it looked like 4 days ago (sorry for the cut-n-paste image, I didn't have a cached version of the site in my browser) As seen all comments in the correct order in the same discussion.

Actual behavior

This is how it ends up now, with the newest comment being on the old commit and vice-versa

(Possible 8.13 regression, #23101 (closed) being the meta-issue)