Chap 1 elite boss battle bug, I guess. If you were to kill it using pheonix combo, he'll still be in there, doing the same animation, but no selectable unit. So like, its probably a wc3 itself bug, but I thought I'd just throw it out there in case its not. Also with the king shop, screen stayed black, luckily there was a quest near-by that resumed it.
Edit: Upon starting chapter 2, warcraft III crashed.