going to say the middle screw needs to be backed off 1/8 of a turn.It limits your over travel, too tight of a setting doesn't allow it to cock or worse yet it will fire as the handle is closing into position. If not that then I would say your trigger spring is too weak which isn't normal unless you've done the g2 ink pen mod which I had over time weaken and do the same thing yours is doing but at a sporadic cadence.