This is a bug that a few people have reported. It doesn't effect a large number of players but it's something that should be fixed for v.06. In the interim you should be able to replay her scenes in the replay room
edit: actually, it's been brought to my attention that because the variable involved with her progress gets reset if you encounter the bug, she won't be replayable in the replay room either. Sorry! Like I said, this'll be fixed in the coming update!