In the fight against Inifere, whenever the toothy thing sucks all characters in and then Inifere attacks and downs someone, the character who is supposed to be downed is still standing, it is still Inifere's turn, but it won't move past that. I can still access the menu and reload, but I always get stuck on that moment when the toothy maw appears(and so far, a character has been downed each time; it doesn't matter if it's a different character). I patched the game before I got the code to explore the necropolis. Before the patch, I got one similar freeze, but when I loaded the game and tried again, I managed to get past it. Is there anything I can do to fix this?

Didn't have any crash in that scene, you should try to contact inXile support and provide them both the savegame prior the Crisis and the player.log file when the crash occurs.