Ive been facing same problem I cleared camp 1by1 (except Dror Ragzlin) and Sazza was alive (somehow she went to upstairs to investigate one of my kill but didnt see me and got stuck near the top secret enterance)
When I killed Dror I went back to talk Sazza - to see if everything is ok. she was dead.
I kept one of my ally near the Sazza to see whats happening during fight . I was thinking that I missed a goblin or traders killed her.
nothing, she just died after fight ( not after boss kill , I killed boss she was alive I killed last goblin she is dead.)
My solution for now : Attack Sazza make her knocked out. After boss fight and killing everyone she was still alive.
I couldnt find any video or information just trying to keep her alive.
I will update if I can get achivement ( I missed the achivement when I stand with goblins, - Idk how but that happened )
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https://imgur.com/a/Emil1x1[/img]
