Larian Studios Forums Divinity: Original Sin 2 Divinity - Original Sin 2 - Bugs & Technical Problems PC Crash after Murga fight/loading Wrecker's Cave

My brother and I are playing a duo playthrough on the GOG version of the Divinitive Edition.
In Act 2, I used Tactical Retreat to jump from Grog's bridge to the Wrecker's Cave waypoint. However, when I tried to enter the cave the game crashed. This happened on 2 attempts in a row, with different times between them, though not much else was done differently.
I can confirm that the moment my character interacted with the cave entrance, the game crashed.
Secondly, upon completion of the fight with Murga, the game crashed. When I loaded, we were back in the fight [i]prior[/i] to the Murga fight.
We'd already completed that fight, gone back to town and done some shopping, then returned for Murga, so a fair bit of time had passed. I believe I'd manually saved, but I can't be sure.
Has anyone else had this issue with Wrecker's Cave or seemingly lost saves?

We played more and encountered further issues.
First, I'm pretty sure I simply forgot to save before Murga.
On the second attempt at the arena fight my game crashed when I was hit by the voidwoken's ranged attack.
The attack was going to kill me, which may be part of the problem, and I was playing as Fane with the shapeshift mask activated to Elf form.