Im frustrated with my Sonos system! I always have to restart my router, restart my phone and then open the Sonos app in order to get the app to recognize the WI-FI and allow me to control the sound.
I've called into customer service but they couldn't help correct the problem except to elude it's my internet provider's issue, however all my streaming services work and so do my other apps when I use my WiFi. It's a Sonos issue and they won't recognize it. We either need to hardwire or be able to use Bluetooth.