A seriously weird bug occurred tonight.
Li'l DP MP was ready (green light). Mechsuit was also ready (strobing lights at scoop).
I didn't want to lose the open drops of Li'l DP by starting Mechsuit, so I locked a ball into Li'l DP. The machine plunged a new ball.
I had a battle ready before Mechsuit qualified, so I shot the scoop thinking Mechsuit would be deactivated with a ball in Li'l DP (even though the lights were still strobing at the scoop).
Instead of starting a battle, Mechsuit started. The Li'l DP drops didn't open to release the ball. Hitting them while in Mechsuit pushed the captured ball back and the drop would be back up before the ball rebounded down.
Played Mechsuit until I lost the last available ball. The end of ball sequence ran, but no new ball was ejected into the trough. Li'l DP released the captured ball and that started the next ball.
All drops stayed down at Li'l DP, and the light still shown green for available MB. I locked a ball, and the machine plunged another ball. I shot the scoop to start a battle before going into MB. The battle started.
I hit the drops, and the same thing happened as before. The drop never stayed down, and Li'l DP MB didn't actually start. I played out the ball, and upon losing it, the end of ball sequence played. No ball ejected to the trough, and Li'l DP released to use the trapped ball as the new one.
When the game was over, I started another one, and the game behaved normally. I know it's not feasible to predict every possible situation and how the software will react. But this was a strange one. Having Mech and Li'l DP available at the same time (and taking LDP), threw it for a loop.