I just had this same problem. You would think that the pop-up coil (up-kicker) would register this,but it doesn't. If you lift the playfield and look at the clear plastic ball subway up towards the "S/Power Shed" there is a switch mounted to the subway, this is what registers those shots. For my problem the switch was working but the ball wasn't pushing the switch down enough to register the shot. I ended up just needing to slightly and gently bend the metal tab a little bit more and it fixed my problem. Hope this helps.