Sonos was set to begin playing a pre-set playlist from a PC at 8:00 am. At 8:35, I noticed that the Sonos chime was playing instead. I opened the Sonos app on my PC and manually selected the same playlist that the Sonos was supposed to already be playing. It begin playing without issue. The PC hosting the Sonos app and the music that was set in the playlist had been on, as well as available to the LAN and Internet, since 5:30 am.