Annoyed that devices just disappear

Sounds like a local WiFi issue. Could be simple wifi interference, or more. I’d start with a simple refresh of the Sonos network: unplug all your Sonos devices from power. While they’re unplugged, reboot your router. Once the router comes back up, plug back in the Sonos devices.

If the issue continues, I would recommend that you submit a system diagnostic within 10 minutes of experiencing this problem, and call Sonos Support to discuss it.

There may be information included in the diagnostic that will help Sonos pinpoint the issue and help you find a solution.

When you speak directly to the phone folks, there are more options available beyond just the diagnostic analysis.

It’s not a wifi issue. This keeps happening with Sonos and for the price you pay I expect better. Currently I can’t play through some devices at all (but it keep randomly changes which ones will play). I’m going to reset my wifi. And restart all my Sonos speakers as if they were new. Such a waste of time and effort. What’s annoying is that the Sonos app won’t recognise some of my devices (but at the same time recognises others, so clearly not the wifi) but my IPhone will allow me to send music to each device (although having issues playing on multiple devices, even though they show as available). This was all working 100% fine this morning. 

The issues are so terrible now. My tv will play through beam, but won’t play through the surround speakers. Because beam isn’t on the app I can’t do anything. Have connected via Ethernet and it sets up fine but beam keeps disappearing. So basically I’ve got a crap sound bar that I can’t join up with anything else. 

@Nortypony, Is it possible to wire the Beam permanently to the router (NOT the surrounds)?

I connected beam via Ethernet. All set up ok. Re added the surrounds. All ok. Plugged in hdmi for tv and now all devices have disappeared from Sonos app. Nothing showing as connected. Can’t connect to any devices. This is an absolute pile of crap. Spent 2 hours trying to just get sound to work and still no joy. Will have to just disconnect all devices, power them off, completelY rest and try tomorrow 

A factory reset of the Sonos hardware won’t resolve underlying networking issues. I advise you to get in touch with Sonos Support by phone.

Yeah I’ll try when they open again tomorrow. So frustrating as I’ve literally reset everything as if I was a complete new Sonos customer and it just won’t work. What a complete waste of money this whole system has been, as now I have 5 devices that don’t work together - and some not at all. Thousands of pounds wasted 

The fact you keep resetting them is exacerbating the problem.  You have network problems, more than likely duplicate IP addresses due to the router rebooting.  By resetting your devices, they are just getting another IP that is already in use.  You need to do a network refresh so the router hands out new addresses to all devices. Otherwise the problem returns every time an IP lease expires.  Reboot/power cycle the following, in this exact order, waiting till each comes up before moving to the next:

Router/modem

Switches/hubs

Wired Sonos devices

Wireless Sonos devices

PC/Laptops/streaming devices

Printer and other peripherals

You can also switch WiFi Off/On on your phones/tablets

After that, you can eliminate the problem entirely by going into your router setup and reserving IP addresses for all you Sonos devices.

This is all just gobbledygook to a layman. I’ve disconnected everything and reset everything. Why does this have to be so complicated? Despite months of everything being absolutely fine, for no reason, my whole Sonos system doesn’t work. Every other wifi device (like my TV and computer) is working fine, so there is no issues with my wifi. 

Have you contacted Sonos about this?