I have had an intermittent problem with the tonneau cover opening on its own with the truck off, key out and locked. So far hasn’t happened in the rain, but I have come out to the parking lot at work to find it open. I have heard the lock mechanism making noise as if I had pushed the button on the key fob without having the key fob with me ( keys in the house ). This is what I found yesterday morning as I was about to leave for work. Any ideas are much appreciated.