2004 911 Carrera Coupe

Within the last couple of weeks, the window on the driver’s side of the vehicle gets stuck on the stationary glass of the rear seat. When the windows are fully up and the door handle is activated (either inside the vehicle or outside) the glass does not drop down sufficiently to clear the rear glass.
This happens about 6 times out of 10.
How can I adjust this?
Does this mean the door is out of alignment?

Thanks for your help.