[Joko Final Fight Bugged? (Final fight spoilers)]

I did, I didn't see anything obvious that would progress the fight.

[Joko Final Fight Bugged? (Final fight spoilers)]

I killed the four 'Will of Joko's' and his royal guards and then the Immortal Joko (boss you actually fight) stopped spawning. The pools of tar(?) the royal guards leave upon death never despawn and the scarabs keep coming, but the Joko you fight never reappears. Has anyone else had this issue?