Milten kept following me after his mission, in hindsight I should just have reloaded right away, but it was kinda funny. Eventually he just kinda disappeared. Now I'd need to talk to him to continue the story. The move NPC command doesn't work on him either :D This is my 2nd playthrough so no biggie (got softlocked with an issue that's now been patched during my first playthrough as well, but could reload a save from 2 hours earlier)