If an edit would result in an entity no longer having any relationships, and thus being removed, it shouldn't be allowed as an auto-edit. There should be time to make a correction if needed. Ideally the edit should be marked as such so voters will see it too.

It's hard to be sure since we can no longer see the edit history, but I think that's what happened in these edits:
https://beta.musicbrainz.org/edit/72826243
https://beta.musicbrainz.org/edit/72826242
https://beta.musicbrainz.org/edit/72826144