I would push the dealer to warranty it. I hope it's just floor covering your referring to. Lino? Carpet? My guess is the housing (the wood box you see) for the slide is dragging a bit and moving the floor covering. Short answer: If I am right, you will have to remove the housing from the frame, push it up a tiny bit, then reattach it to the frame. FWIW Ours has done it as well, so we have a couple of rolls in the carpet. Since they aren't that big, and they seem to have stabilized I have decided to live with it.
2018 Durango 318RLT '20 Ford Lariat F350 4X4 Former RVIA Master Tech, ASE Master HD Truck Tech.