Hello
Pailaka works correctly. We tested it many times, with different characters, different classes. Including passed it today several times. There are no mistakes in it, the final NPC always appears, if the quest is passed correctly - http://prntscr.com/ja5rvg
The only explanation for the fact that you do not have a final npc that you did not talk to all of the NPCs (Temple Inspector), or missed one of the bosses and didn't make a fullcheck