Anyone else using the official Android app and constantly bombarded with "deletealert" notifications? Google is useless these days, but when I've looked into this before it appears this might be related to the app trying to update or remove a previous notification that is no longer relevant.

I don't recall ever seeing this by itself. There always seems to be another notification, usually updates for HA core or HACS modules.

Example: https://imgur.com/a/UEKZUKg