Constantly need to reselect my Muso 2 in iphone music

I have to reselect my Muso 2 in the iphone/ios music app even if I just had a 5 min pause of playing music. This seems odd. I refuse to believe i have to switch to 2.4 ghz internet to make it work. Although the device is still selectable in the airplay menu. Its annoying.
I have read through all threads here i think …. and I would like to hear, if this is a common airplay thing ?