@Mr Omneo,
Just to say diagnostic reports are not always looked at by default here in the user-community - if you want to get information from the submission, it’s usually best to contact Sonos Support via this link:
https://support.sonos.com/s/contact
Meanwhile as you’re using SonosNet (wired/wireless), I would set any wired devices at least one metre away from any router/WiFi access point. Check your network cables and any switches, plus set the routers 2.4Ghz band to a ‘fixed’ non-overlapping WiFi channel, either Ch 1, 6, or 11 - and use a channel-width of 20Mhz only. Then in the Sonos App, set the SonosNet channel to a completely different channel.
Also, if you have the WiFi credentials stored in the Sonos App network settings, you can remove those as you do not have any Sonos portable products, or Era speakers, so that signal is irrelevant and it will stop your devices hopping between the wireless signals.
After any of the suggested changes are perhaps put in place, I would just reboot your router and speakers too.
Hi @Mr Omneo
Thanks for your post!
Please reboot your Playbar by unplugging it from power for 10 seconds or so. This will be important; please don’t skip.
Once it has rebooted (solid white light or no light, depending on setting), please open the Sonos app and re-enable the Playbar’s WiFi card: Settings » System » TV » Playbar » Enable WiFi.
With that done, please disconnect the ethernet cables going to your Play:1 surrounds and your Sub - these devices are supposed to be connecting to the Playbar via a direct 5GHz link, not via the network at large. As they’ll be in the same room as your Playbar, you shouldn’t have any trouble with them connecting.
If grouping, please choose a room with a ethernet-wired device first, then add other rooms - if you put a wireless room in charge, network traffic routing will be less efficient and you may get dropouts.
Test things, and see how it goes. If the issue persists, please go to Settings » System » Network » Manage Networks » Update Networks and go through the process (choose a device at random when asked) until you see a WiFi suggested, then cancel the process. This is so that when you submit a new support diagnostic and reply here with the number given (please do), I’ll be able to see what channel(s) your WiFi is using. Thanks.
I hope this helps.