I've got 8,000 miles on mine and the same problem showed up when the weather started to turn cold.

If you get it to pop when you're standing outside the car hold a straightedge on the side of the door and you'll see it's proud of the side by about 1/4". The door also moves around when the car hits bumps and you get road noise coming up from the bottom and rear edges of the door because the gaskets there aren't sealed.

At the same time that showed up I started to have a problem with the window's top rear edge catching on the drip rail preventing the window from closing.

At the same time those two problems showed up the car started lurching to the right when the right front wheel passed over manhole covers or paint stripes.

I've had it back to the dealer four times and they are unable to fix any of these problems.

If anyone knows of a competent dealer service department to the east of Cleveland, Ohio I'd appreciate their name.