Zigbee thermostat goes idle

I have a thermostat Moes BHT-002 (Moes BHT-002/BHT-006 control via MQTT | Zigbee2MQTT)

I can see it from zigbee2mqtt interface and home assistant. i use the former to set programming temperature.

The thermostat works fine, but after some times, it turns off, and no longer control heater. If i turn it back on, it immediately start functionning again, according to programming.

what am i missing ?

i am facing the following issue: