Gun is functioning properly on all top loading features but on features loaded from the bottom (skill shot or crime wave) the ball will not pop up to the top to load. It will just be stuck in the lower ball popper area. I did a switch test and both the gun lockup and gun popper register. Also all other switches in the corrosponding row/column register in switch test. I took a quick look for any wires loose or broken but didn't see anything obvious. Any other ideas what I can check?