WTF, Sonos?

I generally use Sonos to provide background music or listen to a 2-minute delayed Cubs game, and it almost always comes through for me.

Not tonight, though. A small gathering called for a few of my 17 speakers to provide some '70s chill background music, and of course, it craps out. Completely. Just starts playing random noise halfway through the first song from a Spotify Playlist. Really disappointing, and I'm not going to power cycle every single speaker when I'm tired and just want to relax.

Is there some system issue that I don't know about?

If this is low effort bitching, please delete it. But man, why does Sonos only fail when other people are around?