Unable to trigger quest because Jon Snow completely disappeared

[Klappar]

I've been waiting for Jon Snow's message about the mutiny at Craster's Keep for some time now, but since the mod is such insane fun, I didn't really mind not having the new quest trigger. After in-game months though, I started to worry and tried looking Jon up. I visited every Free Folk settlement and war party thinking maybe he was taken hostage, but he is nowhere to be found. Is it possible he got permanently killed, or that he just disappeared completely off the face of the map? If so, is there a way to bring him back?