Hm, sorry for the poor title. And now there's not really much to type here...
Well, I assume it isn't preventable, as otherwise it probably wouldn't happen. But it's a shame. I can think of ways to keep it playing anyway, but they might cause issues, and they'll certainly be counterintuitive. But I guess the music turning off completely is counterintuitive as well.
Report issues and bugs here.
Fix coming up with 18.0310.