Owwww yeah, didn’t think of that. ‘Quiet’ devices are not marked as unavailable indeed 
To really solve the quiet sensors: As an example, on a Homey 201x f.i., Aqara sensors don’t get along with Ikea lights. I then got the issue with Aqara’s not reporting anymore after a while.
When I didn’t have Ikea lights, or when I replaced them with Lidl lights, I had no issue at all with the Aqara’s.
