Yes! Consider the fact that the full current to the heater passes through your thermostat and the thermostat itself runs on the supply voltage (either 120V or 240V). It's not unusual for Mysa to feel warm to the touch. The regular temperature of a thermostat housing normally varies between 35 °C and 50 °C (95 °F and 122 °F). Therefore, when Mysa is running and trying to power your heater, the heat coming off of Mysa is normal. It only aids to attain the temperature in the room you are heating (not significantly by any means, but a little does still help.)
If you're still having trouble with your thermostat. Please reach out to our team if you have any further questions!