Clarification

Unfortunately, that's just how the music is handled. Where the drums on the beach should've began, it will replace it with the music and go on from there. So no the mod isn't necessarily broken (unless you haven't updated to v1.2.0)

I hope that clears it up for some of you, the threshold in my one test was 40m and after that, the music started. I don't know if that number is constant throughout all games or it's a range (partially because I only did one test), but just know that roughly around that area it starts.

For reference, the plane crash and where you spawn are on 5m high, so it's not relatively far and it should take you maybe 3 minutes to get to that height.