Likely Sonos is having issues with your network tell us a bit about your setup and someone can likely help.

It doesn't matter how well your network works with other things unless they use it exactly the way Sonos does. Most don't. 

​@Stanley_4 this was the answer I expected. Sonos is a bit different. But in the end for the price I pay for Sonos I may expect that it integrates.

Not that I have to create a network at home that is dedicated to Sonos.

I have one Sonos box that is directly connected to the internet. All the other boxes are, I assume, connected to each other. I only have 10 boxes connected at this time.

And I have already unplugged the Router and all other assets. After that plugged in everything one by one. Starting with the router, Mesh, switches etc.

Still no reliable sonos network.

With one Sonos wired you are using Sonosnet for all compatible Sonos and your Wi-Fi for the rest. Sometimes that split is a problem, sometimes passing everything g through the wired Sonos results in less good connections than you'd get on your Wi-Fi. 

I had to tweak a few settings on my network, nothing major and it has been good for yea4s now. As far as I can tell nothing else has noticed the changes.

Maybe check the FAQ and try fully unwired? That is what Sonos is recommending these days anyway.

I have already gone down this line sometime ago when i spent about an hour on the phone with sonos help desk. Until two days ago things had been working on and off with reliability issues then we had  power cut and since then the app doesn’t connect to the speakers then it does then it doesn’t no consistency. I now can’t turn any music on without using Alexa but then I can’t turn it off without using the buttons on the speakers.  I have tried the usual factory resets but the app is too unstable to connect to the speakers.  Wits end comes to mind.

Factory Resets are usually shooting yourself in the foot. Rarely solve anything and wipe needed diagnostic data. Best avoided unless Support suggests them or for a few specific situations.

What your last post sounds like is the classic “Sonos gets confused after updates or power failures.” issue that is still waiting a fix of the root cause.

Until then if you assign ALL Sonos static/reserved IP addresses (see your router’s DHCP page) followed by powering down ALL Sonos, rebooting the router and controllers and then powering the Sonos back up you may work around the problem.

Remember to do it for any new Sonos you add too.

 Would it be possible for Sonos to add a setting to add a static IP Address.  The reason I ask is my ISP ( Xfinity ) keeps changing all my reserved IP Address's back to DHCP.  I have not had any issues with connections, but reserved or static addresses makes sense.

Really hard for Sonos to add that as it brings so many problems with it on an embedded (no operator console) device. Using DHCP is really the only practical method.

I’d look at putting your Xfinity product into Bridge / Transparent mode and getting a good quality WiFi router that you’d control.

​@Stanley_4 now that I have nothing wired anymore the system becomes more stabile. But still there delays and sometimes I need to rebout my router because Sonos is cutting of the numbers I play via spotify. Any more usefull tips? Does it help when I give all the boxes a fixed IP address? Or do I need to swithc from spotify to Apple?

Okay just a few minutes ago I tried to turn down music. But everything had turned gray and I could no longer operate my Sonos speakers. I tried many time to reach the helpdesk but the queues are longer then 60 minutes. Does any one has some ideas how to solve this problem?

Next thing to try is fixing a IP assignment issue that impacts some Sonos users but not all.

Go to your router’s DHCP Settings page and assign ALL Sonos a static/reserved IP address. Power down ALL Sonos, reboot router and power up the Sonos.

That has a good chance of fixing the vanishing problems, once you have that cure in place it is time to look at WiFi connectivity possibilities.  The FAQ has some good checklists if you search on wifi.

Everything is now on a static IP address. After that I restarted the whole system. It seems to work better still sometimes drop outs. Not working fast enough. Any new idea's? Can it be that one of the boxes is disturbing the whole network?

Easy fixes aren’t working you are down to waiting for an issue, submitting a diagnostic and calling (call!) Sonos support to have it looked at.

I have been reading suggestions to call Sonos support, and that often does not help. My case has been escalated to level 3 engineering since late May.  The engineer is very patient in working with me. We have had about four phone appointments and 120 emails back and forth. He has taken over my computer at least two of the times to make sure router settings are correct. He has changed settings in iPhone 14 with latest software. However, I still have issues with dropping speakers.
 

The current set up is Beam gen2 connected to Ethernet (at engineers direction) linked to sub mini (also on Ethernet).   BTW, I was only on WiFi before changes in May with no problems. Then level 2 said to connect with Ethernet, but still had problems. Level 3 said no to Ethernet, Sonos is designed to work better on WiFi. When that didn’t help, he had me go back to Ethernet.  I was directed that when I go to Sonos, I had to uncheck every speaker, then click the Beam to be the lead. 
 

Then, I have 6 OneSLs, four are set up as pairs and the last two are solo. Two of the SLs are gen 1 and, and the rest are gen 2. Finally, I have a first gen Roam. My router is Netgear Nighthawk RAX54v2.  Internet is 1gb from Spectrum. 
 

Several of you from the community gave me suggestions last Summer and Fall. Thank you. 
 

I am beyond frustrated and don’t know what else I can do.  This week alone, I sent four diagnostics via email to the engineer with details of the problems which do include missing volume sliders, dropping speakers, the app not updating to show current song playing in Apple Music. This corrects itself when I force quit the app and reopen it. The engineer checked my phone settings, but that has not helped. I have not had a lost system. 
 

What do you all think I should do?

Thank you. BR