Quoted from Frax:Technically WWFRR is theirs, as it was Data East....
Doesn't Avengers LE have a 6 ball?
Supposed to but I don't recall if it ever got implemented in.
OP - If this is happening a lot then you may want to check that SW45 is not being flaky on you. If it only happens in MB it's probably just the game getting confused but if it happens outside of MB then that may be the cause as that is what tells the game a ball has gone that way and the ramp needs to be lifted.