Quoted from BrianBannon:

Yes, same issue on my game, too, running .66 code. I have tried to recreate it and it doesn't happen every time. It seems like the problem crops up when a ball or balls are already locked in Groot. It wouldn't be a problem if the drop target stayed down long enough in ball search for the ball to fall past it. Also, I am seeing an odd result when looking at the switch test for the groot lock optos, so that may be a cause? Perhaps? Normally, in switch test when a switch is open there is just a dot, and a square when the switch is closed. In this case, when the switch is open there are five dots, looks like a five as seen on dice. This is what you see in test for switches #59-63, though they test fine when a ball is present. Unfortunately, there is no switch behind the drop target to tell the game a ball is there. On mine, the drop target will drop to let the ball out, but when it does drop the lip of the target kicks the ball backward and the drop target pops back up before the ball can roll past it.
I called Chas at Stern on Wednesday and he didn't have an answer for me, said that it was the first time he heard about the

Yes, same issue on my game, too, running .66 code. I have tried to recreate it and it doesn't happen every time. It seems like the problem crops up when a ball or balls are already locked in Groot. It wouldn't be a problem if the drop target stayed down long enough in ball search for the ball to fall past it. Also, I am seeing an odd result when looking at the switch test for the groot lock optos, so that may be a cause? Perhaps? Normally, in switch test when a switch is open there is just a dot, and a square when the switch is closed. In this case, when the switch is open there are five dots, looks like a five as seen on dice. This is what you see in test for switches #59-63, though they test fine when a ball is present. Unfortunately, there is no switch behind the drop target to tell the game a ball is there. On mine, the drop target will drop to let the ball out, but when it does drop the lip of the target kicks the ball backward and the drop target pops back up before the ball can roll past it.
I called Chas at Stern on Wednesday and he didn't have an answer for me, said that it was the first time he heard about the issue.