just bought the DS1200

The issue:
Only sometimes, when I am in the Philips app. it just exits the app (to iPhone homescreen) and regulates the sound to "middle" speakerlevel (the iphone volumespeaker icon that displays when u push the volume buttons) which I don't!?

Even wors, every time I use the built-in radiodevice on the app, it does the same, but by intervals of 30 sec. to 2 mins. before selfclosing the app.

I've tried to soft-reset the Phone, same problem.