This bug is still happening. I'm currently in the mission and Wolf is not spawning. I've completed all objectives except "Deathless" since I can't until I kill the Wolf. I've tried going back as far as I can at the crash site, going to every area, unstuck, tried going past the waypoint and all the mission says is "Get to Hangar".
These missions take so long since Kahl is so slow. lol
I've done every single one of his weekly missions since release.
It's very frustrating to have wasted an hour and if i want to complete everything again, it'll take me another 35 minutes. (approx)