I have 2 HomePods in stereo connected to Apple TV 4K (1st gen).
I have an Apple TV 4K (2nd gen) and several thread devices around the home.
After the latest update to them all, thread has died. None of the devices are responding and the HomePod shows as not on WiFi and cannot access HomePod settings. I can however control music on the HomePod.
I restarted Apple TV’s, thread devices etc and nothing worked. Until I rebooted the HomePods, then they all reappeared. Everything worked again for maybe 5 mins. Then it died again.
In eve app, only the thread devices (bulb, socket, sensor) show in the list, no hubs/routers (Apple TV/HomePod).