Messages app won't stay in "Known" senders folder

Mine doing the same. Probable since an OS update a few weeks ago OS 18.3.1. I have selected "Known Senders" a dozen times but some how it keeps letting unknown senders in. It was never doing this before.

Not fixed here. I keep hoping the public beta updates would fix this, but not yet. It seems each time I get a msg from an unknown sender, the Messages app switches to the all Messages screen until I manually put it back in Known messages. If I’m not aware the app has reverted to all msgs, notifications turn up on my Carplay screen. APPLE: PLEASE FIX THIS!

Been happening for months on mine. So irritating. I wish Apple would spend a year fixing everything and make no new additions to the os other than that.

Your description fits my issue to a tee. It's mid-April now and nothing has changed. This was a feature that I really wanted and Apple delivered. Now, I'm just annoyed.

Has anyone found a fix for this super annoying issue? If Apple can’t or won’t fix it, is there another text app that can be used on iPhone? Any suggestions would be helpful.

Its been happening to me, since the iOS 18

update. It is awfully annoying! I hope they fix this asap, or tell us how to undo the “update”.