Axe of Dargo quest battle bug

This is the second major quest bug I've encountered since I've bought the game a couple days ago, so hopefully there's some sort of resolution (or G&G broke everything).

So I finish the Axe of Dargo quest battle (winning it), and my game proceeds to load out into the main menu (select campaign etc). I've played around with it, advancing turns a couple times and trying to switch up armies etc, but it seems that the crash trigger is directly tied to ending the quest battle.

Any ideas would be appreciated.