WARNING: Does contain minor spoilers.
That said, the first bug has to do with the ‘ending’ sequence where ‘Z’ saves you. If your speed is too high, he will still hit you before the bolt is sent and you lose. To make it happen, set it to 4x speed.
The second bug, which has happened twice thus far (both times I’ve beat the mission besides the time above) the ending sequence will NOT start; causing me to be stuck in the map forever until I quit.
Extra Info: Both on extreme difficulty.
Using Windows 7 playing on version 0.8.6
Neither repeatable directly, perhaps both on chance (besides the speed bug).