2011 Rockwood. When I try to unhook the hitch I'm back & forth, back & forth etc. with the truck. If not just right I'm lifting the truck with the electric jack. Never had this problem with our other ...
If mine sticks when I'm trying to unhook, after i have some of the weight off with the tongue jack, I simply stand on the hitch or bounce it when I'm standing on it and it pops right off.
This is assuming you have your wheels properly chocked before hand!