Just noticed my drivers door pops while going down in my 16 F150. When it's about 6 inches down you can hear a pop, the window and door panel near the lock moves some. It goes down the rest of the way down and up fine. It's just that one spot that seems to have an issue. Anyone have this problem and what was the fix? I haven't had time to pull the door panel yet to inspect. Just looking for things to look for before tearing it apart.