Veteran Sonos owner who just received an Era 100 as a gift - this is my 5th speaker.  Set it up at my office (replacing the Roam I was using) - all good.  But twice today, the speaker has acted on its own, nothing to do with my app (and the voice control/mic is off) - a random beep or two and music stops and starts or, just now, started on its own after I had stopped listening (and stopped the stream on my Sonos app).

I’m sure this is something obvious, but…..help?