This issue is about series with a relationship "has parts" and a release.
(There are some other, already closed similar issues)

I you edit a series like
https://musicbrainz.org/series/0a72fcf9-bb5f-415d-a5ce-672a00c7d0fa
you can not see if one of the entries (#58 in this example) has a pending edit until you try to edit it again.

Then you get a warning.

It would be better to highlight every pending edit. I hope the attached AniGif can explain it better.