Playbar with Sonos One rear stuttering

Is your Eero 6 Dual Band or Tri-Band?

How far is your Playbar from your router?

Are they in the same room?

Is router downstairs as opposed to your TV/Playbar or vice versa?

Are the walls between your router and your TV/Playbar?

In addition to wifi interference , which ​@AjTrek1 seems to be thinking about, I’d also be thinking about duplicate IP addresses. Less likely than ​@AjTrek1 s line of questioning, but possible, whether or not the speakers are connected via WiFi or directly wired to the router. 

​@AjTrek1 Eero 6 are Dual Band.   Given that I live in a city in an apartment.  My electronic cabinets, including the router is right below the TV/Soundbar (about 2 feet below), separated by a 3/4” plywood (cabinet shelving).

The 2 rear speakers are about 15 feet away from the Playbar, no obstructions between Playbar and either rear speakers.

Everything is in the same room.  I of course have additional speakers in other rooms, to which some Sonosnet cannot reach (hence the need for a mesh router system, but these are working just fine on via Eero).  

As mentioned before our Wifi is very saturated.  I counted at least a dozen instances of Wifi signal each in Channel 1, 6 and 11 from neighbors.

EDIT: I failed to mention there’s also a 1st gen sub connected to the Playbar.  But with just the playbar and sub I don’t ever have any issues, the issue seems to only persist when the surrounds are also connected.  This sub is 12 feet away from the Playbar in the same room, with no obstruction at all in between.

​@Airgetlam Would you know how would I go check duplicated IP addresses?  

There seem to not be any duplicated IP from device info in Sonos app, nor in Eero app.

I’m also wondering if power cycling the devices would help solve IP address issues?  I have done so to the Sonos devices in question, as well as the router system and LG TV. 

It’s not easy to check for duplicate IP addresses. Most routers show ‘what is connected at the moment you run the report’, and not ‘what is connected over time X’. 

Before I set reserved IP addresses for my system, I would occasionally do a network refresh in order to clear this possibility. After setting up reserved IP addresses in my router, it was no longer necessary. To perform a network refresh, power down/unplug all your Sonos devices, then reboot your router. Wait a couple of minutes for the router to come back up before plugging back in / powering on your Sonos devices. That’s the quick way of checking. The more permanent version is to check the router’s manual, and set up reserved IP addresses in the router’s table. It’s effectively the same thing. 

There are tools out there that report duplicate IP addresses, I’ve never tried them, since I preferred the ‘free’ method. 

Note that power cycling the devices only really works if you have the Sonos devices off while you power cycle the router. If you do them sequentially, one or more devices can hang on to a ‘bad’ IP address. 

So make sure you unplug everything (TV and Sonos) before you reboot the router. Wait for that router to come back up before plugging everything back in. They’ll pull new IP addresses from the refreshed firmware on the router.