It happened to me as well, mostly when I'm threatening Adventurers to give me all their loot, and they attack.

I've seen this as well. Sometimes activating "quick combat" will fix things.

I believe this has already been reported to the devs.

If this is for MotBW:

This happens to me both in-combat, at the end when it's about to go out AND on the overland just taking turns. No pattern to it. Just seems completely random!

I have had it happen now a lot of times. In combat I can get past with quick combat or loading a save and not fighting in the same province.. I can not get past the out of combat freezes. I had been playing for about a hour on this shard I was about to conquer and the turn froze. I tried going back to older saves but to no avail it always seemed to freeze on the same turn. I really like this game but will shelf it until I see some real progress with patches.

this actually happens to me after forming an alliance with goblins, not in the battle screen, freeze with hourglass pointer for eternity.