Homekit hubs and secure video in two different homes: camera images and hubs mixed between homes

My setup is as follows:

Home A:

AppleTV and Ipad as hub, two Netatmo Presence outdoor cams, one Netatmo Welcome indoor cam, all using Apple Homekit Secure Video.

Home B:

AppleTV and Homepod as hub, one Logitech Circle 3 cam using HSV.

Problem 1

Homekit locates me in Home A although I am in Home B. No device is currently in Home A and all location services work fine on my Phone. I am located in Home B but Homekit does not want to accept it.

Problem 2

My cameras snapshots do not update properly as widely reported but worse, they get mixed between both homes (snapshots from Home A appear in Home B), which is really weird.

Problem 3

Cameras from Home A stop working in HSV from time to time (but remain connected in their native app). When checking the hub status of each home, all hubs are visible in both homes but randomly, only one in Home B seems active (Homepod) and all Home A hubs are inactive.

I do not understand why hubs are mixed up and competing over two different homes. All 3rd party hubs and accessories are kept separate.

Problem 4

Even when hubs work, Netatmo cameras fail to register movement and record. Up to now no definitive answer on the culprit.

But all in all the system is pretty unusable at present. Using it to provide security for a home more than 500 km away is a disaster.