It sounds like your slides are way out of alignment. I had a similar issue with my ‘14 Sabre. It was bad enough that all my slide seals were torn up as well as the window seals in the slide side windows. The work was beyond what my dealer could handle. FR took my fiver back to the factory twice to get it repaired. Knock on wood, they seem to be behaving since then. Get it fixed while under warranty.
2014 Crew Cab Chevy Silverado 3500 4wd Duramax/Allison
2014 Sabre 34REQS-6