I took delivery of a (second hand) walking dead LE today. All works well other than the crossbow seems to get stuck in "swinging" mode some of the time. I'll load the ball into the crossbow, take the shot, but the crossbow keeps moving back and forth across the playfield. I thought maybe it was only happening when i missed the crossbow shot but that doesn't seem to be the case (it just seems to happen some of the time). It kept moving till i drained one time and then another it seemed to keep moving ever after i plunged another ball.
Any suggestions on what i can try / how to best troubleshoot?