Quoted from Traveler76:One of the Aerosmith pins at Arcade Expo had the same issue. I don't have insight into exactly why or how to fix, but I did experience this too. The kicker would launch the ball towards the closed toy box, and it would bounce off of Jacky's head. Some people playing it thought that was intentional, but it seemed like a fault related to the toy box opening properly.
wtatumjr is correct is saying the box isn't supposed to open each time.
In a single player game I believe it is supposed to open to catch the ball each time a ball is locked, but in a multiplayer game...it depends on the circumstance. EX: If player 1 locks a ball in the box and then player 2 gets a lock....the game will purposely keep the lid closed for that ball (as a ball is already in the box from player 1). So it just depends how many ball are physically in the box, what player is locking the ball and how many they are supposed to have locked in there.
I realize, this doesn't sound like it pertains to the issue the OP is asking about. I just wanted to explain why the toy box doesn't open for each ball lock in a multiplayer game.