I also have this bug, it looks like Judy is teleporting from the elevator to where she should go, this is when she gets out of the elevator, when she and V are going to kill Woodman, and when she gets out of the elevator at the end of the quest, but because distance is big game thinks V left Judy I got a text from her that I left her and the quest was finished but it started again after 2 seconds from that point I can't finish it, I can talk to her, but even if I do quest, still show, "Talk to Judy."