The app cannot always discover Sonos speakers
I have two Sonos Play 1 speakers connected to two different networks by LAN cable. When I am on WiFI 2 still the app on my iPhone sees Sonos on WiFi 1 and cannot discover the Sonos on WiFIi 2. In most of the cases I have to remove the app, install it again reboot the router and Sonos and afterwards the Sonos is visible again. When I cannot see the Sonos from iPhone app, I successfully play music from my Mac that is the same newtwork like the Sonos and iPhone.