Hello,
How come after so long time, the airplay issue was not solved. It is a main functionality. Already reported some months ago. Basically, if you stream from an airplay device using realitimeaudio, not buffered, after some time no audio is playing. Try using plex or vlc on apple tv, or stream audio from a macbook to sonos.
Do you guys have this issue?
BTW, youtube or apple music is buffered audio, so no problems here.