@Wayne-TP This is not what I observe, otherwise I would just return or sell all thermostats. The sound of valve closing is exactly when my current system reports "not heating" = off. And the other...

I just enabled Matter in Kasa app and added KH100 hub with KE100 thermostat valves to Home Assistant. I used these already in HA, but through unofficial integration plugin. Problem: thermostat valves...