HWH Jacks Retract After Leveling

Had a similar experience with the RVA jacks on our coach. Parked in a spot we'd been in many times before. When I got up in the a/m I noticed the rt rear jack was retracted. I retracted the jacks and releveled. It was OK after that. Now I bump each jack from the keypad to be sure they are all on the ground before shutting down the system. I think what's happening is the system, is sensing that a jack dosn't need to be extended more but it isn't actually on the ground. Since my make model coach has a tendency to break windshields if improperly leveled I keep an eagle eye on it after it's set up.
Ron