It might be an issue with an incompatibility with some Samsung televisions.

I get constant audio dropouts while watching television over a wired connection (NO DROPOUTS during music playback over WIFi), not experiencing any wireless interference, and a working optical cable.

I've sent over MANY diagnostics, and had several troubleshooting sessions with various helpful Customer Service reps, with no solution. The last person told me they are having an ongoing problem with Samsung models, and Sonos is creating a case file.

Sadly, this helps me in NO WAY AT ALL except to perhaps diagnose the problem. Now, I own a $700 terrible piece of audio equipment.

Hello, I don’t know if this is the same issue everyone is having. But my system’s  sound kept cutting out while listening to music for a few seconds and coming back on. I have a playbar, two play 5 (2nd Gen) and a sub. I had the playbar connected to my sony Bravia TV (not even year old) via digital sound cable. Found out while the tv was off/stand by mode, it was sending a signal to the playbar, intermittently making the music to cut out. I disconnected the tv from the playbar and that solved the issue. After being told by sonos that I had a wifi conflict issue. Did all the disconnects, restarts, reset the entire system etc. very time consuming to say the least… none of that helped. I solved the issue myself..  Hopefully this will help someone out there having the same issue as me. 

Solved this problem. Well it doesn’t solve it, but I’ve at least figured out the conflict. 
 

Unplug the optical cable. Since doing this I have been able to stream music to my playbar with no interruptions. 
 

I have a funny feeling it has to do with the TV trying to send a signal to the playbar. I have a Sony Bravia and you can send movies and music to it, even while it’s turned off. The TV will automatically turn on from the mobile or tablet device. 
 

This leads me to believe it’s the optical cable. The signal isn’t getting from the TV to the playbar. 
 

Also, can absolutely rule out the internet being the issue. I’m on WIFI with REALLY BAD speeds. Every other device that is running throughout the house will continue to run without the same delays the playbar was experiencing.