SiriusXM 'file not found'

I was playing SiriusXM through Sonos in my kitchen zone while making dinner. I then shut it down and moved out to the patio zone and tried to play SiriusXM in that zone, and it kept throwing a 'Cannot play SiriusXM {channel name} - file not found.' error.

I switched the kitchen zone back on and it played... I shut it off and switched back to the patio zone and SiriusXM started playing.

Any idea what that was all about? For future reference...