Galaxy s22 ultra.
Keep randomly turning off app pop ups. The main one being Facebook messenger. Everything app wise is correct (appear on top, chat heads on ) however app pop ups in the notifications have to be turned on. (Phone based settings wise not the app) Chat heads work perfectly then every so often even tho it has all permissions, I've turned off sleep app, clear cache, or remove unused permissions.
I've followed others advice who seem to be having the same and again every so often it turns them off again. Done many cache clear then storage then deleted fully without keeping app data and re installed. And it still does it.