I'll agree that the stock stuff is pretty good. But advertising has done Barnett well.
Regardless, we had a problem similar to this with kevlar clutches several years ago. You put it in, adjust it, ride in, and it all comes apart as it gets warm.
Kevlar clutches MUST be adjusted when warm. Seems as though they change how they work over a heat range.
Still check everything over, but it might be easy to try and adjust it warm and see whay happens. I would bet that Barnett will recommend this also.