Hi! I have been experiencing multiple issues regarding preformance in Generation Zero as well as the DLC Alpines unrests. I think it may be the large amounts of assets around where bunkers are. Everytime I go near a bunker there is a noticiable problem with lag, especially with Alpines unrest, having to defend the hotel. I crash everytime or that the health of the hotel is to little and gets demolished because the robots will not focus on the player, but rather only on the hotel. I’ve crashed 9 times trying to complete this mission and I just think Alpines unrest is great just a bit too much for the console capacity.
Did you try to uninstall and reinstall to see if it is working?