Same here with the grey handle on our fifth wheel. Had to screw it back on. Removed the first 3 feet of coroplast covering to get to it. Found out the cotterpin they used feel out.
Plus it was rubbing on the backflushing water line to the black tank and wore a hole in it that leaked when I backflushed the tank. Spliced in a piece and covered it with pvc pipe to prevent further issues.
Makes me wonder how fast they put these together!