Keep an eye out at the bottom of your slide out wall. This just started this Spring. This is on a 2006 8314ss Rockwood. I can see the wall moving when I bring the slide out in after camping. I do not know what the problem is yet, I am about to take it apart.
FR cut you wall panel too long. Trim off about 1/8" from the bottom of the panel. The floor in new flush floor slideouts tends to "rise" a little bit when the slideout goes all the way out, thus buckling the wall when the floor comes up to meet it.
i have an 8313krss and i noticed miine doing this also. However i believe it has something to do how the trailer is sitting also. Because now i have moved it and put it back so it's sitting a little different and now when i pull the slide back in , it isnt buckling anymore.