I've had some that did that, 95% of the time a bend of the reflector as the others mentioned would fix it. If it still hit, the midplate can be bent...
I'm always looking for amber Edge lenses. I know I have a full set of lenses for a 50" 9M (1/2 red, 1/2 blue) & endcaps w/alley cutouts I could trade...
I bought a set of edge lens from him through ebay last year. & after about a week he sent me a message saying he had a death in the family & it would...