Hello,
I have 6 cameras in use via Apple Homekit, and I've personally only had 2 or 3 disconnections when I'm away from home, but the camera that has been affected comes back up fairly quickly. Otherwise I haven't had any problems.

Unfortunately yes ... even the latest ones that are in use. I had to replace one camera completely as it could no longer be integrated at all.

Yes indeed, I have 3 at home and one of the 3 disconnects all the time, every time I reconnect after 2 days it stops...