So I've tried searching around to see if anyone else has had this problem or if there was already a solution for it, but I haven't been able to find anything.
Basically what my problem is that a few certain BGM tracks don't seem to be playing in game.
These ones in particular:
12- Streamside
65- Into The Abyss
72- Big Guys Love This
There might be others, but the maps where these are supposed to play are the only silent ones I've come across so far.