My driveway is on a decline. I find that it helps to keep adjusting the chocks as the trailer will actually pull itself forward when the tongue goes up. By doing this you'll have a clean uncoupling and you won't have a lurch backwards when the hitch disengages.
2017 RAM 3500 SRW Laramie Crew Cab Long Bed w/6.7 CTD & Aisin
2015 Eagle 284BHBE Premier
Here is how I unhitch. I chock the trailer wheels and use the power hitch jack to raise the TV enough so that I can take the pressure off the equalizer hitch bars (chains). But I don't unhook them, I put the chains in the last link giving them plenty of free play. Then I lower the TV until there is no pressure on the trailer hitch. I pull the pin which keeps the ball hitch connected to the TV and drive out leaving everything intact including leaving the equalizer hitch still attached to the ball. Really simple and fast. I leave the equalizer hitch locked to the ball and attached to the trailer until I need to hook up again.
My dealer told me that the hitch should be adjusted so that the ball tilts back just a little, in other words not perfectly perpendicular to the ground. This seems to have eliminated the "stuck ball" problem on my x17z.