We had the same issue with our 2017 Forest River Wildcat with the laminated floor developing soft spots along with a couple cosmetic issues with the the outside fiberglass. Long story short they actually replaced our rig vs trying to repair it. Replacing a floor correctly is no easy task and am so thankful they offered to replace it. Our replacement is still technically a 2017 but has some positive changes that we like better such as an outdoor ref. and 16" wheels. They even threw in a 2nd AC unit which our first unit didn't have. I know our case is a rarity from what I always read but Forest River and our dealer treated us good getting this resolved. They even compensated us for any mods we made.
One thing they did say was there was a batch that went thru that had bad adhesive and I got the impression it went back on the adhesive manufacturer.
Dan