Surround speaker has started to disconnect frequently

Thanks for the suggestions. Have removed/swapped/re-added as suggested and have spent the last few hours watching some shows without issue.

Will see what happens whilst everything is idling overnight and, if anything has dropped offline by the morning, I’ll follow the next step re: removing SonosNet from the equation.

Good news - looks like removing/re-adding might have done the trick. Still connected after 10 hours overnight. Will put them back to proper left/right orientation tonight and see how things go.

Thanks again for the suggestion 👍

Damn - I spoke too soon. Just applied the 15.3 update and the right surround has dropped off again within an hour (also switched speakers back to proper L/R orientation earlier today). Will re-investigate.

Could be an issue with your router’s assigning duplicate IP addresses in error, or continued wifi interference . 

At the very least, I’d try a network refresh, by unplugging all Sonos device from power, then rebooting your router. Give the router a couple of minutes to come back up before plugging back in your Sonos. 

Thanks for the suggestions. Unfortunately I already tried that yesterday (it’s buried away in all the waffle in my original post 😁). All my devices have reserved IP addresses, and I’ve thoroughly checked for conflicts. Yesterday I turned off every device in the house, restarted the router, then switched on only my Sonos gear and my phone (I needed the phone to use as a controller to check what was happening). The speaker had disconnected again within the hour.

When I get time, I’ll disconnect the Beam from ethernet so that everything connects to my router directly instead of using SonosNet.

I’m currently in the middle of repeating last night’s test and reversed the speakers again, as I’m interested to see if it’s just happening on the same physical speaker, i.e. I’ve temporarily assigned the problematic rightmost speaker as the left surround instead to see if the left surround now drops out rather than the right. I was hoping this would have happened when testing last night but annoyingly everything stayed connected overnight!

I’m also hoping Sonos can take a look at the diagnostics I sent yesterday - 522827366 - a few minutes after the speaker disconnected

And as if by magic… the LEFT surround has just dropped off (i.e. the same physical speaker that was the original problematic right surround yesterday.)

New diagnostics sent: 1873586997

The only Sonos folks here in these Forums are moderators, and not Sonos Support folks. Those moderators certainly help out where they can, and do an excellent job, bur it’s not their main function. You’d get much faster response if you were to call Sonos Support directly to discuss those likely very useful diagnostics. 

Thanks for the heads-up - didn’t realise these forums weren’t generally monitored by the Sonos Support folk.

And for what it’s worth, my apologies for missing the fixed IP settings comment in your first post. I’ll admit that I dont always re-read every single post in a thread….