I ran into the problem where bull was invincible in the brewery at the end of the quest. I ended up restoring to the last save I had before meeting Travis in the bar. Whil I was in the bar fight my companion (Preston) ended up shooting both bull and his companion to kill them. After that the Russian brothers did some complaining about bulls death but the quest proceeds down the same path to the brewery, however this time there's no invincible bull at the end stopping the conversation with vadim.

Yep happening to me as well. Chances are, you are also unkillable. This is really ruining my gameplay because my last save was at hour seven and I'm 20+ into the game.

I'm praying Bethesda fixes this... It's killing me. This is a game breaking glitch!

this glitch i completely ruined my fallout experience, im unkillable i have this annoying nerd following me around all the time, he doesnt even crouch so i can no longer sneak ever... i cant play like this but i certainly cant lose 5 hours of gameplay either. i pray bethesda fixes this huge problem asap

this glitch i completely ruined my fallout experience, im unkillable i have this annoying nerd following me around all the time, he doesnt even crouch so i can no longer sneak ever... i cant play like this but i certainly cant lose 5 hours of gameplay either. i pray bethesda fixes this huge problem asap

having the same exact issue...will not play game until fixed