Lost surround and sub ( after update ?)

Also, this is the status of my system,

I am currently not getting sounds from the back speakers and cannot see any network issues.  

Everyone see a problem?

@Brad Porter,
Perhaps contact Sonos Support as suggested in the answer shown to this thread and provide them with any diagnostic report references obtained and see what the Staff say.

Yep, done that multiple tines (5 diagnostics) and no resolution. 

Also, this is the status of my system,

I am currently not getting sounds from the back speakers and cannot see any network issues.  

Everyone see a problem?

 

Where do you get this information from? I am going to phone Sonos as they have requested but unfortunately only open 9-5 Mon to Fri, difficult when i am at work

Go to:

http://XXX.XXX.XXX.XXX:1400/support/review via a browser, replacing XXX with your IP of the Sonos device found in the App under About My System.

Then click on Network Matrix

What did the Staff say when you spoke to them, was anything seen at all in your diagnostic reports? Anything said about your elected STP root bridge? 

Sadly not, they said they were seeing network congestion and we went through a whole process of changing channels etc. They then wanted me to reboot all my network/sonos devices (for a second time) but could not as people were using it to work. 

I have an open case to return to them and do the structured shut-down and power up again.  But never had this much issues in 18 months. 

@Brad Porter,
It is just that in many cases I’ve seen, of small Sonos systems like yours, that the wired Boost will often take on the roll of root bridge in the STP network unless there’s perhaps a switch elected with a lower bridge ID and I see that is perhaps the position in your case, or at least that appears to be the case as no root bridge is showing in your Sonos matrix. So I was just wondering if there might be something surrounding that, which ‘might’ be causing the dropout issue.

Here are the ‘general’ settings Sonos recommend for STP to work with Sonos and I’m just wondering if support checked your elected (non-sonos) root bridge.

https://support.sonos.com/s/article/2118

Sometimes a simple network reboot (in order shown below) can sometimes cause the Sonos Boost to be re-prioritised and elected as root bridge, but I’m just not sure if it will help with your issue… but as the saying goes "nothing ventured etc…"

Work permitting, maybe try powering off all and bring back the devices online in this order (let each device settle before moving into the next):

• Modem/Router  
• Directly wired Sonos device (Sonos Boost)
• Other wired devices
• Wireless Sonos products (nearest first, then next nearest)
• Anything else 

There are ways to force the STP bridge priority, but that’s perhaps something to look at with Support Staff, that’s of course if it may have any bearing on your issue (I’m just not sure what difference it may have). Anyhow I hope that you are able to get the issue resolved. 👍

Here’s what mine shows

Someone on the subreddit just posted this, so yeah I’m definitely confused 🤷‍♂️
 

Update May6: Update May6: After the issue returning again, and another power cycle, and surround factory resets with support chat, they did acknowledge Sonos was actually aware of the issue saying;

“Our developer is already working on it, And they will give us a heads-up once they figure out the resolution for this issue. …. Yes. We are receiving a lot of contact with the same issue with this update and we are always sending it to Feature Development team.”