How close do you live to the manufacturer? The only reason I ask is because I had the same issue with my Wildcat that had a soft delaminated floor. I told the dealer I would gladly pull it to the manufacturer for repair as I only live a couple hours away. Long story short Forest River replaced our fifth wheel with a new one. Although ours was still under warranty, they did blame it on a bad batch of glue as my manufactur date fell in a known timeline. If you can bring it there so they can see it with their own eyes they may form a different opinion. Chances may be slim but worth a shot
Dan