I had one of my club members mention that there was a problem with his coupe's wing. He said that it went up fine but would not go down unless he turned the key off and started the car again, pressed the button and it would work. He also told me that a piece of equipment was installed and this started happening afier that. I told him to bring it back to the installer who insisted that all was fine from his end. Next stop was the dealer. I suppose it's fixed, haven't heard otherwise.
Never had a problem with mine, nor has anyone other than the dude I mentioned.