Charter / Spectrum SAX2V1S, SAX2V1R, SAX1V1S compatibility
These routers have a known issue that prevents them from working with Sonos. The solution below will ensure that they will work with Sonos.
Issue
When your Sonos system is in a wireless setup, Sonos products disappear from the Sonos app.
Solution
Set up your Sonos system in a wired setup.