It happens several times a day. The sub and symfonisk cuts out and from all controllers, the +? appears. Occasionally, it reconnects. I have no issue with any other speakers. Diagnostic report #508733282
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Userlevel 7
Be sure you have WiFi enabled on your Sonos Beam.
You might also try unplugging the Beam and affected speakers from power for about a minute and rebooting your router.
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