Same problem as yours.

Lastly, I observe problems on the regulation of the temperature of my QHY183M.

The behavior is random, the automatic regulation works, the next day not.
Ditto with manual control, it works for two or three inputs, after the command does not seem to reach the camera.

I would post the logs for the next test.

Laptop or PI, with two QHY cameras (183M and 5LII-M).