Have you checked the timing of the rest. I am guessing it is falling too late and not getting out of the way. You can check this easily by seeing how long it takes for the rest to reach full height in the draw cycle. It should be at the very end of the draw cycle. No more than 3or 4 inches from the back wall is a good starting point. You want it down before passing the valley. That should eliminate the problem. This of course is after you set the nock to 3/16" to 1/4" above level.

Good Luck.