Any other service could be an indication. Pandora was certainly having issues yesterday, as I recall. Have you tried these things?
- Reboot the router.
- Reboot the Sonos speakers.
- Reboot the device that the controller is running on
- Make sure the device running the controller matches the data in the supported OS for controllers FAQ.
- Make sure the network provided matches the specifications in the Sonos Network Requirements FAQ.
- Call Sonos Support to discuss it.
When you speak directly to the Support staff, they have tools at their disposal that will allow them to give you advice specific to your network and Sonos system.
If you provide us more information, we may be able to be less generic in our suggestions.