Board Thread:Music Packs/@comment-30919177-20161122192811/@comment-25376906-20161125180301

You are welcome, I'm glad I could help :)

I think it is intentional that the currently played music track does not stop when changing the biome. I have experienced this too and the track will simply play until it ends and then the new biome specific music starts playing. Otherwise changes would be too abrupt and as such it is not a bug.