Any theory why the driver window raises slightly when opened?

Every video I’ve seen of the truck that shows the door being opened or closed with the window completely lowered, shows the window slightly raise until the door is closed. I’ve never seen this behavior in a vehicle before and can’t quite figure out why it might be doing that. It’s definitely intentional and not a fluke. My only thought is if there’s some geometry with the window and motor that make it likely to break if someone slams the door while it’s completely lowered.

Any other...

Any theory why the driver window raises slightly when opened?