Xbox...
Single and multiplayer
Multiplayer game friend hit him and he disappeared.
Single player new game save , he disappeared and i did not hit him .
Started a third new game , and well hes gone again. No one but myself even spoke to him and he was not assaulted in any way lol
Last quest handed in I think was the oak marker one . Was able to get the next 3 but he was gone when I went back to buy building schematics.