retman
That's interesting.
I wondering if updating the ASIAIR app/firmware to 2.5 then also update the firmware on the ASI220 Mini camera as well?
If that is the case - then the issue would be caused by an update to the camera firmware - since that would explain why the issue sticks around even after downgrading the app/firmware of the ASIAIR itself (assuming the downgrade was done properly and it didn't auto update itself of course).
Does the Firmware Upgrade Tool (go here https://www.zwoastro.com/software/, then select Desktop App, and scroll down to Fimrware Upgrade Tool) tell you what firmware version/date you are running on the camera?