Multiple crashes in "darkness" stronghold before "pit of anguish"

** EDIT: appears to be fixed in patch 2.0.2c **

Been trying to power through the “darkness” stronghold before “pit of anguish” - multiple crashes in different zones always during an encounter.

Windows10 pro
CPU: AMD 3700x
Memory: 64GB
GPU: Radeon 5700xt latest driver

Note: has been stable today except for this area; prior to 2.0.1 I was getting lots of crashes.