Say you have some patron attributes. Modify them at the OPAC, approve the change. Then go to your personal detail again, save without modifying anything: the staff get an entry in the "pending patron modifications" list https://snipboard.io/s9JVjA.jpg
I think this is probably a duplicate. *** This bug has been marked as a duplicate of bug 30431 ***
I think this is probably a duplicate. Hm, and a regression from 35929?
I think this is a new bug. The bug relates only to patron attributes, and only to the situation where the patron has an existing attribute and they submit the OPAC form again--with or without any other changes. So it is a regression, because Koha doesn't tell the user no changes were made if no changes were made. But it is also true that the patron could make changes to other fields and Koha would still think the patron attribute was changed.