I've defeated the Black Guardian and talked to Jespar in the Sun Temple Vault afterwards, then told him my decision to flee to the Star City. Then the quest Fleshless completes. But after that, (sometimes a loading screen will show up first) it goes to a completely black screen in the same room. There are also occasional continuous explosions left over from the battle with the BG in the background all throughout my conversation with Jespar and continuing through the black screen until my character eventually dies waiting for the next quest to start. Then it starts over talking to Jespar again in the Vault. I've been stuck here for a while and tried going back to old saves multiple times and at multiple points, but each time it turned out even more buggy, so I decided to stick with the saves I have. Even typing "startquest mq18a" hasn't done anything.