Setup: LG OLED C2 TV + Arc SL + two One SL surrounds
Problem: Within 2 seconds of changing sound output from the Arc SL to the TV Speakers, automatic return to the Arc SL.
- Sonos App → TV Autoplay → OFF
- No other external devices to simplify debugging
- Unable to disable SIMPLINK (HDMI-CEC) on TV. Automatically Turns ON within 2 seconds of turning OFF
Workaround: Pull power cord off the Arc SL and then switch sound output on TV