This has happened to me too All of my savegames have been effected and no amount of restarting is fixing it. I sure hope this is fixed next week.
EDIT: So according to this
https://www.reddit.com/r/projecteternity/comments/30lzd8/game_breaking_bug_ranger_companions/
It happened to the OP right by the sacrificial pit in the endless paths. That's LITERALLY the exact same spot where my game got broken from the same bug. Hopefully the devs see this cos that's beyond coincidence.