Apple now no longer signs iOS 16.0.3 essentially preventing downgrade from iOS 16.1.
Reference: Apple Stops Signing iOS 16.0.3, Downgrading From iOS 16.1 No Longer Possible
Recommendations
Developer:
Disable automatic update, if device must be kept on iOS 16.0.x version.QA engineer:
Disable automatic update, if device must be kept on iOS 16.0.x version.PM/DM:
Business as usual.