Check that the flange is not sitting above the floor and that the floor is level.
Also check that the floor material is not soft from rot and is the point of movement
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