ShieldTV — Kodi / Spotify App

Hi,

I have a small problem.

When watching live tv and playing music thru the spotify app there is no problem, but when i zapp the channel music played by Spotify app on my shield stops.
After that i can press play and the music and live tv are working together, but after that when i zapp again the music stops etc.

Does somebody has an idea how to fix this problem?

Kind Regards