That looks like the molding on a slide. If that's the case, we have a similar problem with ours. We had the dealer install a new molding because ours was crunched similar to yours at the bottom. We thought all was well until we noticed the new molding cracking. WTH
After a little troubleshooting, we found the slide-out was overextending a slight bit which tilted the outside wall up as the top seated and the hydraulic ram (at the bottom) continued pushing outward. This tilted the whole box forcing the molding into the carpet and pulling it away from the wall.
The fix is to adjust the ram limit but so far I've just been careful to watch it extend and stop it as soon as everything squares up.
Hope this helps.
2012 Georgetown XL 350 TS