I have a problem with DS9800 airplay speakers.
The speakers randomly become unavailable for airplay streaming, although it remains on and available in airplay menu of iPad. If I try to send the streaming signal to the speakers the playback just stops.
All other functions continue to operate: device is visible on the wi-fi network, I can play music through aux connection, indicator shows that the unit is on.

Usually this happens after a few hours of being idle, but there's no rule. Sometimes it happens overnight, sometimes it does not.

The wifi network is fine, my B&W zeppelin air doesn't have such problem.