This is a bug I keep frequently getting, my party members are in my party while at the same time they aren't.
then at the Lillith fight, it's just a constant loop of I beat her, I can't progress and when I try to leave it retriggers the event of entering the room and I have to refight her.
Tried doing a screenshot but it wont upload. it's the jail cell, the statue immediately left of it, and the one down-left from there that blocks a gold chest. Just realized that they are non essential to continuing that dungeon. I found out you can cross the teleporter if you have no spirits. did it and finally managed to complete the pyramid