RIP Music?

This game is amazing and I love it, but the only problem is, my gameplay is dull because for some reason them music in-game doesnt work...if I get into a boss battle I do t hear the opening guitar rift to Unholy Confessions like I used to on my old iPhone 5. I play on an iPhone 6+ now. Could you guys please take a look at this?

dtonko about Deathbat - GameClub