In music triggers, when "BOSS" is included in mob trigger, it checks the boss bar appeared on screen(and plays the music).
However, even if the boss bar of conjunctivius is on the screen, the mob trigger is still not triggered.
Steps to reproduce:

1. Install music trigger 6.3.1 and its dependency, and minecells.
2. Put this file in config.
   MusicTriggers.zip
3. Summon conjuctivius in game, the boss music is not playing.