I remember this happening a while ago but now that I know there's no posts about it, I'm going to create one.
The problem is that the overworld music in Bastion (before being restored) plays through for about two loops, then stops, leaving only the environment effects. I have reason to believe it might have something to to with the hill where Old Cob releases his children. If that area does trigger the bug, then it's very inconsistent about it.
