No Music in Howling Abyss

It's been occurring for awhile, everything else plays (ambiance, sfx, etc.) but the music will never play. Sometimes it happens in Twisted Treeline as well. I've checked all my slides for volume settings and I tried disabling and enabling again to no avail. I checked my output settings (I own a Mac) and everything is in order. Note, this has been happening for awhile. I've seen some posts that it's a bug that has been happening since patch 6.8 but who knows. Any ideas?