The game has crashed on me on various levels and several different scenarios when a mine has destroyed another unplucked mine.
In level 14, Liberation and level 12, One Hundred I intentionally sent a flower to a grey roid having one defensive tree. I planted the flower and a grey mine grew. I sent my own mine to the grey roid and the game crashed shortly after the grey mine was destroyed. I got an "exception" error. This was no big deal since I was just playing with the game mechanics and not playing to win. However, it has now occurred other times.
Again, I was fooling around, planted a flower on a grey roid, but it was attacked by another AI mine. The game crashed.
Most recently, I sent a mine to an enemy roid having a mine that was in the process of growing. The enemy mine was destroyed and the game crashed. This was in normal gameplay, and although other unplucked mines have been destroyed, it chose this time to crash.