I am having the same issue with the stabilizer jacks on our 2015 Jayco 26BHS. It has been a problem for over a year now. I haven't had time to get it back into the dealer to have them take a look at it, so I bought four vice-grips and have to use those to clamp back-end of the screws to keep them from backing out every time we use the camper - it's getting old.
I called the dealer and am waiting for them to call me back to schedule a service appointment. With work and other obligations, it's going to be a pain to drive the 120 miles round-trip to demonstrate what is going on with the jacks. It would probably be cheaper/faster to replace all four with BAL jacks.
I called Jayco today and they said the jacks on my unit were provided by a company called Crystal Valley Sales. I called Crystal Valley directly to talk to them and they had never heard of an issue like this.
I'm wondering if anybody with the same issue got it resolved and what the problem was. I did find an exploded parts diagram for the BAL jacks and they have show an "o-ring brake" between the thrust bearing and the spacer bearing washer. This is where the "slippage" seems to occur when my jack screws back out once I put them down - I don't have anything like that o-ring at all on mine.
2015 Jayco 26BHS
2006 Ford E350 w/ K&N Cold Air intake and SCT X4 Tuner (running custom tow tune w/ OD lockout)