Did you have to back-in at an angle, have to 'jack' the 5vr to get into spot ???
Any maneuver forward/reverse that is not straight will 'jack' the tires/axle on multiple axle trailers.
First time noticing this......have you always owned the 2009 5vr?
Otherside same way?
If it's not from maneuvering could be broken shackles/bolts, worn bushing or 'U' bolts.
Also compare arch of spring packs
Is it time for your medication or mine?
2007 DODGE 3500 QC SRW 5.9L CTD In-Bed 'quiet gen'
2007 HitchHiker II 32.5 UKTG 2000W Xantex Inverter
US NAVY------USS Decatur DDG31