I ran one for the longes time with a blietzkrieg buffer and never really had any issues.
One observation is that if for any reason the bolt slows down, the bolt catch notch cut into the bottom of the jp enhanced bolt will snag your next round in the mag and cause a double feed. It happened to me maybe 2 times in 3,000 rounds and I attributed it to user error, mostly mine (ok ALL my fault), where I rode the charging handle back ever so slightly rather than slightshot it back into battery. I induced doubled feeds and could not for the life of me figure it out until one day while dry firing I rode the charging handle forward slowly and saw the face of the bolt would feed a round and the notch would double feed the next round.
I have full confidence in the bolt but just something to be mindful of, the bolt catch notch is cut at an angle and with the inertia of the bolt going forward this is not likely to ever happen.