Climate turns on randomly

I integrated a Mysa thermostat as a HomeKit Controller device and it works as expected. However, it changes the mode from “off” to “heating” on its own once every few hours. I know this is not caused by someone unintentionally touching the thermostat or controlling from the Mysa app because the Mysa app shows the thermostat is off, even when Home Assistant shows it’s on.

How do I go about debugging what changes the climate mode? The log just says “Changed to Heat”

Did you work out why this is happening? Im having the same problem