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I was so impressed with my first Sonos Beam (2nd Gen) I recently took advantage of the 20% off and plashed out on another Sonos Beam (2nd Gen) plus 2x Era 100’s as a home theatre set. 
 

However, I keep getting sound drops on TV/Xbox Series X but not on Spotify. 
 

I have a Samsung UE65AU7100KXXU, fully updated on eARC

Sonos Beam (2nd Gen) Is hardwired to my router via Cat5e Ethernet cable 

Era100’s are on WiFi in the same room as my router 

 

All speakers are updated and when I untethered the Era100 form the Beam i get normal sound (no drop). But when I reteather the Era’s the sound drops again. 
 

The only fix I have is to turn off eARC and change to PCM. However, my other Sonos Beam (2nd Gen) works fine on eARC

Also followed the troubleshooting instructions on Sonos main site.

Any thoughts on what I’m doing wrong or where the problem lies?

This seems to happen with many Samsung TV users. Make sure the Digital Output Audio Format setting is set to Pass-Through, not Auto. If this doesn’t work, try this:

Disconnect everything from the TV and unplug the Beam and TV from power for a couple of minutes. Plug everything back in but keep everything disconnected. Make sure Anynet+ is enabled in the TV settings. Run TV Setup in the Sonos app and follow the app instructions. When the app instructs you, connect the Beam to the TV’s HDMI ARC/eARC port using the Sonos-supplied HDMI cable. After the Beam has been successfully connected, connect your other devices to the TV.

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