This is new to me in just the last couple of sessions. In the INDI control panel at the start of the evening the Rigelsys NStep reported 12°, the capture sequence was set to refocus on temp delta > 1°, and by 4:00am (when I woke up to check on things) the reported temp was 9°. No autofocus run happened during the session, aside from the one at the start of the sequence. I can test in the next few nights if setting a refocus time will serve as a workaround.

Is there a different log setting to see if the temp sensor is getting polled? At the end of the initial autofocus run there is a line in the log that says "Temperature = -10.1°" - which is the QHY183C's sensor setting.