Sure sounds like a local network issue, I have none of these problems on my system. Have you submitted a system diagnostic within 10 minutes of experiencing this problem, and called Sonos Support to discuss it? there’s just not information provided up in your post to speculate on specifics. 

Yes I did that. That’s the same thing customer support said and they walked me through resetting my local network wireless and hardwired using a Ethernet connection and resetting my router and wireless connection. The thing is also is that non of my other IT devices don’t have any problems connecting to my local network ie: laptop, smartphone, tv, iPad etc. I was even advised by customer support to disable connection of all my other devices from my local network and try connecting with my Sonos device only and still no connection.

The challenge there is that Sonos doesn’t operate like most other IT devices, it uses the network in different ways, which includes talking to each other, which most devices don’t do on a normal basis. Normal IT devices usually only talk to a single device, be it your PC, or the internet, and tend to be tolerant of interruptions, something music streaming, and Sonos, tends not to be. 

What I think you’re describing is a client isolation issue, where the controller is having trouble reaching out to the Sonos devices. It may be (and it is hard to tell) that the Sonos devices are having trouble talking to each other, and/or reaching out to the source of the music, be that local, or internet based. The difficulty is you’ve not provided much information about your setup. 

Unfortunately, I can’t see the data you’ve submitted as a system diagnostic to tell, since I’m not a Sonos employee. If I were to guess, there are several potentials. First, and in no particular order, a mesh network that breaks the various ‘points’ into different subnets, that Sonos isn’t designed to communicate across. Second, a VPN, work profile, or other port blocking type of software, keeping the controller from communicating outward to reach Sonos servers, and then back to your speakers. This, mind you, is S2 only, I think, S1 is still local, but would certainly be affected by blocking outside devices like the speakers. Or, possibly, some issues with wifi interference , even some incorrect setting on your WiFi, so the system you’re running doesn’t actually conform with the requirements in the Sonos Network Requirements FAQ. Or you could be running some unsupported hardware, such as Powerline devices. 

If I were you, I would call Sonos Support again to discuss it. Hopefully getting a different, and more knowledgeable representative.

But what you’re experiencing right now is not normal, at least in my world of S2 and more than 20 speakers, both wired and on WiFi. 

I’m having the same issue! I’ve called the Sonos custom service but this is still not working. I’ve spent over $2k for this system that looks pretty but doesn’t work! No one has seem to work it out both even Greek Squad!