Why think out loud instead of asking the app developer about the problem in the official Aqara topic?
[APP] Aqara & Xiaomi Smart Home - Simplify your life with a smarter home
Btw, the Aqara topic would have been the right place to post the problem anyway.
Unfortunately I recognized this topic too late. There were already too many posts and it wasn’t clear, at least for me, if the connection of the sensors were broken or if just a flow for the notification was missing. Therefore I didn’t moved this thread to the Aqara topic.
@Kay_Kretschmer, my suggestion is to discuss the problem with the app developer in the Aqara topic.