This is what I noticed in my first beta 3 game.

When I attack a group of trolls which includes a troll warrior, the troll warrior does not get any turns. It stands there and my units kill all other trolls and then whack it until it dies.

When I attack a lone troll warrior, something weird happens. It is queued for its turn; but should I cast "Slow" on it, it immediately gets its turn and all icons on the left of the screen shows its potrait (except one of mine at the very top). It then proceeds to move and hit and my units can only counter-attack - so pretty soon they all die. My unit potrait at the top stays at the top, it seems the troll refreshes its initiative or something. I have reloaded twice and the same thing happens when I cast 'Slow" on it; the spell "Shrink" is fine and does not trigger the weird berserk behaviour. If, however, I quickly click on auto-resolve, the troll dies as it should but not before the game records my units as dead (whichever was unfortunate to receive the troll bashing before I click auto-resolve).