I would take a look at the strike of the lock and see which side has a ware mark on it and file some material off the strike plate that is making the mark.
If the mark is on the bottom of the strike the problem will only get worse as the hinges ware. In time you may have to reset the door
WBCCI 12156 AIR 3144 WACHUNG TAC NJ6
2004 Excursion 4x4
1991 34 ft. Excella +220,000 miles, new laminated flooring, new upholstery, new 3200 lbs axles