I have the same problem with my Guardian. The problem is, the shorter your draw length, the more surface area is exposed beyond the module (as shown in your picture). The longer your draw length thesurface area reduces, as the module goes out wider on that shelf.

My serving is beginning to rub away andflatten quite a bit where it contacts the top cam, and there could possibly be some limb twist at full draw even with the new center track cam technology.
Changing the cable slide does not make any difference, as I have tried 'several' and the contact still exist.