Diagnostic code = 952119553
Best answer by Jeff S
Your PLAYBAR is having a hard time communicating wirelessly to the rest of your Sonos system. As you had the same issue with your BOOST, I'd guess this is likely due to wireless interference. Please try changing the wireless channel on your Sonos system.
Currently you have 10 Sonos players grouped together. This increases the bandwidth needed and may be a factor. Do you have the same issues when using fewer speakers?
It may also help to make sure your BOOST or PLAYBAR are not too close to your router as your router's wireless signal could interfere. Also, look around and in between your Sonos units for third party wireless electronics. Devices such as cordless phone bases, wireless cameras and wireless baby monitors can cause interference with the Sonos wireless.