I've had this happen. When I picked up my first Bigfoot camper from the dealer, it was raining lightly. We put the camper on the truck and stepped inside to get out of the rain. We had left the wired controller hanging on the door for the cable connection. After awhile I looked out and saw one jack moving, it had already hit the ground and was picking up that corner of the camper intent on overturning it. I ran out and unplugged the remote, which stopped it. Water had gotten into the RJ45 connector, and activated one jack.
My current Bigfoot (10 years newer) has the RF remote. There have been a couple of occasions operating the jacks when they continued to move after the buttons were released. I don't know if this would stop given time - and I was unwilling to invest the time - so I began pushing all the buttons in a bit of a panic and it stopped.