sound suddenly stop when playing on android

[kuroidouke]

Hi guys, I recently started to use ppsspp. My version is 1.3.0.1. and using the default setting. I am playing fate/extra ccc jpn and the sound (mostly back ground music) always suddenly stop. It doesn't matter where i am or what i am doing in the game, the sound just suddenly stop. and there is no way for me to fix it. Please let me know if anyone has a solution. thank you very much.