Sound of external apps stops while launching the game

If I have sound playing in the background (for example music) when I open Minecraft Pocket Edition on my iPod, the sound pauses. It does it while it is saying, "Mojang".

It has been doing this ever since I installed it. I installed it on my iPod when the game was somewhere in 0.15.

Edit by PHO:
The issue has been worsened in 1.1, that is, when you have a background app playing music, the game no longer plays its own sound. In versions prior to 1.1 it was properly mixing its sound effects and the music played by another app.