Now that I read your post I believe that is the same issue I read on the other forum, just hadn't remembered the scenario correctly, the individual had the same issue, when he lifted his trailer off the hitch it would lift up the truck as if the ball was stuck inside the coupler. Wish I could locate the post but essentially that sounds like the same issue. Now this person had mentioned how there had been occasions when the truck had really bounced after the release. But sounds like it may have been an exaggeration?