J bugs out in act 2 if you don't talk to her at a certain point in the story she gets treated as alive but gone by the game


When he summons the tentacles and disappears from the roof battle she expects you to talk to her before following him and bugs out if you don't... Any point before leave the Shadowlands for Baldur's will be ok to talk to her here and fix this error in the game script


Luke Skywalker: I don't, I don't believe it.
Yoda: That is why you failed.