It appears that this is a continuing issue with the Fleetwood Discovery. We had the same issue with our 2012 36J after the warranty had expired.
http://www.irv2.com/forums/f107/kitc...ll-213939.html
When reading the link, don't give up hope. At the end, after writing to Fleetwood, the CEO had a rep call me and offer to reimburse us for the repairs. When putting the cabinetry in place, they had missed screwing the retaining bolts/screws into the ribs behind the wall.
Total time for the repair was 1 day to bolt the cabinets back to the wall and glue the "tile" in place, and 1 day for it to completely dry before we could head home.
I'd recommend contacting your dealer, and seeing if Fleetwood will reimburse them directly for the repairs if not under warranty. Sorry to hear that this issue continues.
Good luck - hope this helps!
__________________
Joe and Debbie, Emma the Aussie Cattle Dog who adopted us
2012 Discovery 36J, Blue Ox and Air Force One, 2010 GMC Acadia Toad
USAF (Ret) WDØM
https://wd0m.com