The other day I was firing my 3AT with some old WW yellow box ammo that I had. I was doing all right at ~25 yards with it on a life size target. When all of a sudden the trigger upon pulling would not not engage and drop the striker. I took the gun apart and figured out it was the disconnector. It was sticking in the down position instead of poping up. I cleaned it was well as I could and put light lubricant on it. It seems to work, but it is still a little sticky. Has anyone else experienced this failure?