Welcome to the forum!!
It seems they either work well or they don't. Mine works well and there are no adjustments on the movable part of the coupler so ?????
If the hitch is under tension or compression it will be difficult to raise the trailer off the ball for example, trailer wheels firmly chocked and the vehicle rolls forward or backward a fraction of an inch when placed in park.
2006 23B Hybrid with 10k round bar WDH
2011 F150 4x4 SCREW Ecoboost, Max Tow, Integrated TBC, 3.73 LS axle, Firestone Ride Rite airbags.