Game crashes often trying to fight Jamanra 2nd time.

I finally got an error I can report. This is very frustrating.

[D3D1] Failed to create resource for texture
[Art/2Ditmes/Weapons/TwoHandWeapons/TwoHandMaces/Basetypes/2HMace05.dds

PoE 2 Bug Reports:
https://www.pathofexile.com/forum/view-forum/2214

With specific conditions causing crashing, it is most likely a corrupted file.

The typical fix is either run pack check/Steam integrity to see if it can repair that file, or full re-install and be sure to delete any lingering files so the re-install doesn't miss over anything.