In normal operation, the window is supposed to retract that 1/2 inch when you pull either the inner or the outer door handle, and then stay in that position while the door is open. It is only supposed to go back up after you close the door (and do not have the handle pulled out).
The malfunction you describe is usually caused by a defective microswitch inside the door lock assembly, or a loose/broken connection going to that switch.
Regards, Maurice.
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