Sorry for the late reply. I still can't get used to opening the forum every day, and I have been busy recently. I am so sorry.
So yes, based on the info, your cam is an older version and the whole system went off when CAMERA_STOP or switch resolution is called.
Maybe when INDI starts triggering, it would call switch resolution, even if it is the same resolution but the procedure would call the CAMERA_STOP.
Or maybe after the sub is finished, INDI would call CAMERA_STOP to put it to reset mode.
Neither of them is necessary if the user does not switch the resolution.