It’s a known issue. There is a fix but it requires some finesse. You can find the fix on a reddit thread. Here’s what I did: It corrupted every save file i had previous to completing it. I had to go back and load and lost about 1 hour or so. I used the reddit thread and redid the quest and so far have not had any issues. What i had to do was to scout the one camp, go back to Bernard, but instead of saying “lets go” say hold on a minute (or something to that affect). I then went back to the camp and stealth killed wolf. I was able to do this by going to the camp guard and telling him i wanted to parley. I then stepped away from the camp for about 30 seconds and the wolf finally says something to the affect of “to hell with this, I’m not going to parley.” However, when you approach the camp again the soldiers in the camp aren’t hostile. you can move freely about. I have the stealth kill ability, and stealth killed him. You have to run like hell after, because you’ll have 15 angry wolf fanboys chasing you. After you get back to Bernard, just tell him you killed him and he’ll tell you to go back to Hanush. I completed it and my saves stopped corrupting after.