Constant crashes during boss battle at Temple of Copec (didn't have this issue before)

Just had 4 crashes to Desktop at the battle with the boss of Temple of Copec. I never had this prior to 0.4, save for an occasional crash once every 20-30 hours.

Also, this is the first time a game causes an overload on my GPU and the UPS backup to winch I have the PC connected. No other game or software causes this issue. Even a full GPU load with offline AI can get an occasion beep form my backup battery, while during the campaign in 0.4 I am hearing beeps very often.

Just here to report that I also am experiencing this issue. It seems to occur when he does his scorching ray mechanic during or right after the fireball bullet hell mechanic without fail for me, if that helps.

I did try resetting the instance and rushing back to the boss room, but it happened again.

Not sure what else I can do or what hardware info I can provide since I'm running this on a GeForce Now cloud gaming instance and access to the filesystem and settings is locked down.

Hope that helps for whoever is debugging this.