Best answer by Airgetlam
But if that doesn't work, I would recommend that you submit a system diagnostic within 10 minutes of recreating this issue, and either post the number here, or contact Sonos to discuss it. I tend to suggest the phone folks, they have more tools available, but are only available during business hours. Both the Twitter and Facebook support folks are available 24/7.
There may be information included in the diagnostic that will help Sonos pinpoint the issue and help you find a solution.