Has anyone had issues with the lift gate closing on its own? It has happened to me 3-4 times while I was standing under the open liftgate. Had to hold it up with both arms to stop it. The other day it happened twice while unloading stuff from Costco. But this ttime it happened while I was walking away from the PP and was about 10 ft. away. Can never get it to replicate. Key was in pocket every time. I have auto lock turned off. Any ideas?