App doesnt see my Speakers anymore

I wouldn’t bother with chat, you’re most likely talking to a ‘bot. I’d call back in, and suggest, due to the light on the router, and several different tries with various Ethernet cables and ports on the router, that there might be a fault.

Unfortunately, I don’t have a Move or Move 2 to test with. 
One final thought, though. Is there any chance that when you factory reset the device, you set it up as a ‘new’ system? That would certainly cause one speaker not to be seen by all others, and vice versa. Might be worth doing a factory reset on just that one speaker, and trying the ‘add a device’ function while your controller is connected to all working speakers. Just make sure you’re not setting up a ‘new system’. But that doesn’t really address the yellow light on your router. Given that you’ve tried many different cables, I’d suspect a bad port there, or a failure in the speaker. But if you’ve tried multiple ports on the router, it points to an issue with the speaker.

I really wish I had access to the data from your diagnostic, it might be hugely helpful to know what router you’re using, or other details you’ve not shared, such as network types. I’m forced into guessing, based on your frustration and limited details. 

I’d still call Sonos Support directly to discuss it.

Rgbeek;

Reading back over the posts, I’m confused. If your phone cannot communicate with the system, how did you submit diagnostics?

There are usually two lights associated with each network port. One light is steady when there is a valid connection. Steady green is typical tor this light -- indicating a Gigabit connection. SONOS uses 10/100  network connections and this light will be another color, usually yellow, but I would not be shocked if it was orange. This light should not blink. The second light flashes with each packet sent over the connection. Yellow is the typical flashing color. If you were using a high end network and mesh, points the light behavior might be a little different. The router documentation will clearly lay this out.

Which model router are you using?

The diagnostics for each of my three calls to sonos support showed the move two is communicating properly with wifi and with the other speakers. I did the diagnostics through the app on my phone and the diagnostics gave me a number that I relayed to the sonos person.  I couldn't see the results of the diagnostic, but they could.  The problem is isolated to only the app that can't communicate with any of the speakers.  The issue isn't with just one speaker it's with all of them.  According to the diagnostics they're all working fine.

Also, my router is a netgear nighthawk pro if that helps. To be honest you've already spent more effort and had more suggestions than I got from Sonos support.  They literally had zero recommendations after doing the diagnostics.  They were less than helpful, and utterly useless in solving this problem.  At this point I'd rather talk to a chatbot.  They're at least programmed to seem human like.  

Regarding the network router, I don't have any mesh, just the router base. And I've rebooted the router several times with no change.  

The diagnostics don’t display anything for the user. Only remote SONOS staff can access the diagnostics. (they are stored remotely)

I’m still confused about one point. In order for you to see and report the diagnostic confirmation number, your phone/pad/computer must be communicating with the players.

Can you capture any screens and post them here? For your own security you should remove any account identification details and diagnostic confirmation numbers.

I'm not sure what screens you would need.  The screen I get is literally just the initial screen you get before installing any speakers.  When I click on either "join existing system", or "set up new product" it just says no products found.  The only exception is when I did a factory reset of the move 2. The app saw it, and let me set it up as usual, but the instant the setup finished, the speaker disappeared from the app and it says no products found again.  I havn't tried doing the factory reset on any of the other speakers since that experiment failed.  

You're correct that the diagnostics found my speakers and reported all were working normally, as well as confirming my phone and app were connecting to the wifi properly.  The issue isn't the speakers or my phone, it can only be between the app and the speakers themselves.  And sonos support literally offered zero options or solutions.  

I FIGURED IT OUT.

I FIXED IT.

IT'S WORKING AGAIN. 

So here's what I did. Previously we had isolated the issue to the app not communicating with the speakers through wifi.  The speakers router, wifi, and app were all working correctly according to the diagnostics, so the issue had to be between the app on my phone and the speakers themselves.   

With that in mind, during one looong sleepless night I decided to look at literally every phone setting, and every app, and every app seeting that had anything to do with wifi.  I loged every setting one by one on a tablet and changed each one, then went back to the sonos app to see if anything changed, if nothing changed in the app, then I'd go back to that setting set it back to the original, and move on to the next. Rinse and repeat, brute force troubleshooting. After literally hundreds of setting changes...I found nothing that fixed the issue.  

BUT, along the way I spent a considerable amount of time with the VPN settings on my phone and I found one obscure note. In the tunneling settings within Nord I discovered that it said VPN tunneling was incompatible with Sonos. So I went back to sonos to see when the last app update occurred, and it coincided with the issue I was having.  

Apparently this latest sonos app revision is incompatible with the revision of NordVPN I'm using.  For security reasons I don't want to state what revision that is in case there's an exploit that I'm unaware of. 

So long story short I adjusted that setting and when I went back to the sonos app it's magically working again.  Someone should tell sonos to beta test their stuff before releasing it, and they should quit thinking they are the only product that uses wifi.  Their shit needs to be compatible with the other stuff, and ignoring that is exactly why their app is so buggy.  The sonos app may work perfectly in their test environment in isolation, but that's not how their product is used in the real world.  

If their product doesn't work in the real world, it doesnt work period.  Fix it.  

Thanks for posting your resolution. This may help some others who are struggling.

Your experience does expose an industry issue. Should or can manufacturer ‘A’ notify all potential product users that ‘A’s latest implementation creates issues with ‘B’, ‘C’, …, regardless of who is ultimately responsible for the fault.

Ideally A, B, and C should be designed to be compatible with each other. That's what industry standards are for.  Every wifi router is compatible with a set of industry standards, and every product should be compatible with those standards.  As the standards are updated, the app and products should concurrently be updated to be compatible.  That's why the standards for the next revision are released to the developers a year or more in advance of implementing the new standards.  

To your point though, I believe yes, if your product is going to be incompatible with the industry standards (for whatever reason) they should be transparent in informing their customers and ensure the customers don't mistakenly adopt (or be forced to adopt) the new build unless and until they have confirmed the compatibility issues, and have passed that on to their product support team.  That's the whole point of beta testing.  Identify and correct any compatibility issues BEFORE releasing a new product into the world.