Crash Jamanra phase 2

Hi,

Since I arrived to act 2 Boss, my game keeps crashing when entering phase two.

Yesterday it happened for the first time, then I couldn't log back game instantly crashed. I logged in in town, started the fight all over again, then crashed it phase 2.
I tried again today, same scenario at first. Then I loaded back in the caravan, and it started to crash 5 sec after I entered the instance.

I rerolled a new character, no problem, but i don't know if it will get through the act 2, but i hope GGG will fix the bug before that.

Things I tried:
- Rebooting the game (obviously)
- Updating drivers (clean installation)
- Changing game settings (low graphics, resolution, etc...)

Configuration :
- Nvidia RTX 4090
- AMD 7950x
- 32 Go DDR5
- SSD PCIe 1To
- Screen 3440x1440

just gonna say : this is happening on Smith of Kitava using Bear form shapeshift if that can help.

Once the crash has happened, the instance is not possible to rejoin. It is happening every occurence of the dreadnough split by the boss is done and crashes immediately before the 2nd part of the fight actually is displayed.

Vulkan / DX12 did not change anything. Resolution / scaling didn't either.

Hope this helps.