My Sonos Beam cuts out for 3 to 5 seconds at least once every two minutes when I am watching cable TV. That only happens when I am using my cable box as input. I have a Vizio Smart TV, and when I play from any of the apps (e.g. Prime Video, Pandora) the Beam works just fine. The problem is only with cable TV. My cable box is connected to the television via HDMI cable. My Beam is connected to the TV via HDMI arc.
TV audio settings:
Speakers - Off
Volume Control Display - On
Surround Sound - Off
Volume Leveling - Off
Digital Audio - Auto
Analog Audio Out - Variable
Cable audio settings:
Audio Coding Format - HDMI (if I use other options there is no sound at all)
3D Mode - Disabled
Dolby Volume Mode - Off
I found something that recommends disconnecting all input cables from TV, turning it off for awhile, then turning it back off. I have tried that, and it helps for awhile. However, I would have to do that every time I use my TV with cable.