Has anyone had their tailgate open on its own. In the last month mine has apparently opened on its own as i've been driving 3 different times. I'm sure that it was closed before i start to drive, then when i go to back up my camera is pointing at the ground. I could believe it was open once but not after seeing it open after driving. i've tried to pull it open to check the latch but it doesn't budge. Is there anything to check or look for.