I had the same issue come up with my ‘19 32DS after my first ‘spring tune-up and maintenance’ on it. I also figured out it was my kitchen slide right behind the drivers seat that I could hear and feel thudding on take off, braking, and even turns that would cause good but if body roll. Then I figured out that the rollers beneath the slide out were most of what limits the shifting of the slide out from front to back, and therefore the liberal amount of silicone I’d thought was proper to apply as a maintenance measure was not a good idea. Cleaned rollers and the underside of the slide out, then to create a light tackiness I applied Belt Conditioner spray to the rollers and to just the underside of the slide out that those rollers makes contact with. Problem solved immediately and has not reoccurred.
I’d advise you to also check the very small rollers on the front and back inside wall of the slide out to make sure they were not crushed by the shifting of the slide. My front one was and I replaced that.
2019 FR3 32DS