Immortal empires mid-game crashes at end of turn

Loving Immortal empires but has anyone else had issues where the game will crash at the end of turn? No matter how many times I restart the game it will continue to crash at that same end of turn. The game will cycle through a few factions during the end of turn phase but will crash at one of them.

This has happened to me twice now on two campaigns (The last defenders and Khemri). I have to essentially abandon the campaigns. Is there a fix or just a bug in the beta?