Soft floor spreading but can't find the source

I have not heard of your model having floors fail due to breakdown of the glue that holds the plywood and foam layers together. (Yours may or may not have this type of laminated flooring.) Maybe someone else had this problem with their Coachmen. I know of two Keystone Cougar TTs (2010 and 2012) that had glue failures (ours and someone else I met on the road).