My 05 Forest River All American Sport does that a little when on the truck. but no were near that severe. It closes when its on the landing gear. looks like you jumped it... another thing I found when I installed air bags on my truck is that it took out most of the rear suspension travel so my fifth wheel front end was forced to flex harder over bumps. I installed an air ride pin box and not only do I see less flex but the dishes are as I left them in the cabinet. Money well spent when you watch the amount of pin box travel in your rear view mirror that with out it would be frame flex on the front end of your rig. Also check for frame cracks and frame failure in the front of your unit.
