Sonos is skipping tracks and freezing. I have reset the router and all of the Sonos components and updated the controller to the latest version. It is misbehaving when using Spotify and when streaming from my NAS drive. I have also changed the WiFi channel from the default to an alternative with no improvement. It will play one track midway and then skip to the next or even multiple tracks. The system is now completely useless for music playback.