I love Sonos products and have a dozen different speakers, amps, sound bars, etc.
Using the iPhone app to control them is maddening. It must be the most sensitive app to any hiccup ever written. The app continually goes offline “unable to connect to Sonos system”, typically when I need to turn it down/off for a phone call. After a few minutes, it comes back. I can force it to return by turning off Wi_Fi on my phone and rejoining the network.
Nothing has changed on my network for over a year. Same router, SID, security, etc.
When is the next update to the Sonos iPhone app expected? It’s overdue….