I have a Royal Rumble, when in test mode the pop bumpers work great, when I pull the glass and roll the ball at them by hand, they work great, but when a ball is hit into them with the flippers or upon the opening shot of each ball, they work 20% of the time. Seeing the ball roll through hitting them and nothing happens has made the game hard to love. I have also adjusted and cleaned the switches. One individual told me to reflow the board, before I do that, has anyone else had this issue with a DE and, have a potential fix?