Noticed this bug in 1.11, haven't tried it on older versions:
The ball save timer for the subway eject will override & replace the standard ball save timer. For example, let's say that the game's main ball save timer is set to 30 seconds, and the subway eject's is set to 2 seconds. Shoot the subway immediately on launching the ball as your skillshot. When it ejects, you'll now only have a 2 second ball save, losing whatever time was remaining on the 30 second ball save.
Also, I know it's pretty common feedback that the extra ball animation could be shorter. It is pretty frustrating to get an extra ball during a multi ball or while a single ball is in play... when the GI turns off for the light show that's associated with the animation, it makes keeping the ball in play nearly impossible. If the animation has to stay the same, please remove the light show when balls are in play... or at the very least keep the GI on.