Lots of crashing and Blasphemy visual bug

Since about 15 hours ago I've been getting loads of crashes. One every 10 minutes or so on estimate, sometimes even more. The game barely ever crashed for me before this. Has anyone else experienced the same and is there a fix to help the issue? I tried reducing the framerate but that didn't seem to make a difference.

Also, the visuals for the Blasphemy aura are bugged in the Act3 camp. The texture is messy and there's a visible square that shows the AoE.

I was crashing from day 1, but once or twice a session.
Last night I crashed 5-6 times in a short session.
All crashes happen in Clearfell Encampment. Never while in a dungeon hunting.

Same thing happened just then to me.

First crash in the middle of a boss fight
Crashes 6 or more times in a row all while attempting to load back in to ensure the checkpoint was reached. Gave up and time for bed