After talking with Sophia and got the quest "Signal Point In Space", I returned to the Unreliable, and then returned to Sophia, she turned out to be DISAPPEARED! I tried to finished the quest by travelling to Devil Peak Station the travelled back, the green pointer for the task "Return to Sophia" points directly above of her but she is invisible. I tried to shoot to the place where she is standing to see if there is some problem with the graphic, but i just simply shoot into the air. I could not talk to her to finish the quest because she seems like vanished.