Body: Hello, I am experiencing a persistent and frustrating audio dropout issue after updating my Apple TV to tvOS 27.0 Beta(Build: 24J5325d).[Hardware Setup] Source: Apple TV 4K running tvOS 27.0 (24J5325d) Display: Sony BRAVIA XR-65X90L (Connected via HDMI 4) Audio System: Sony HT-S2000 Soundbar + SA-RS3S Rear Speakers + SA-SW3 Subwoofer (Connected to TV HDMI 3 eARC port) [The Problem] While watching content randomly across various apps (including YouTube, Infuse, and Apple TV app), the audio suddenly cuts out completely. The Sony TV then displays a system error message: "TV speakers activated due to audio system communication failure." This issue is intermittent, occurring once every few days. Once it happens, the eARC handshake appears completely locked up. The only way to temporarily restore the audio system connection is to perform a full system reboot of the Sony TV or toggle the Apple TV audio input source. [StepsTried/Troubleshooting] 1.Format Isolation: If I force the Apple TV audio output format to "Change Format -> Dolby Digital 5.1" instead of the default uncompressed LPCM, the connection becomes significantly more stable and the dropouts cease. 2.Cable & TV Check: All HDMI cables are Ultra High Speed (HDMI 2.1) compliant. TV settings such as "RS232C control" have been disabled, but the issue persists on the default Auto/LPCM audio output mode. [Expected Behavior] The multi-channel audio stream (LPCM/Atmos) sent from Apple TV should pass through the eARC chain smoothly without causing HDMI-CEC/eARC packet collision or freezing the display's audio daemon mid-playback. It seems like the LPCM audio stream packaging or the CEC heartbeat signals in this specific tvOS 27.0 beta build occasionally send corrupted or unexpected data packets, triggering an aggressive eARC protection/fai-safe mechanism on the Sony TV side. Is anyone else experiencing similar eARC dropouts with Sony sound systems on this beta? Any insights from the engineering team regarding HDMI/CEC driver changes in this build would be highly appreciated. Thank you!

Basic Information:tvOS Build: tvOS 18 Developer Beta (Build 24J5325d)Apple TV Model: Apple TV 4KConnected TV Model: Sony XR-65X90L (Firmware up to date)Connection Setup: Apple TV connected directly to Sony TV via High-Speed HDMI cable.Summary:After updating to tvOS build 24J5325d, the HDMI-CEC (Bravia Sync) feature broken specifically for powering off the television. When putting the Apple TV to sleep (either via the Control Center or by holding the Power button on the Siri Remote), the connected Sony XR-65X90L TV remains powered on. Steps to Reproduce: Turn on both Apple TV and Sony XR-65X90L TV.Ensure HDMI-CEC is fully enabled on both devices (Control TVs and Receivers is ON on Apple TV; BRAVIA Sync Settings are fully enabled on the Sony TV).Press and hold the Power button on the Siri Remote, or open the Control Center and select "Sleep".The Apple TV goes into sleep mode, but the Sony TV stays turned on. Expected Results: The Sony XR-65X90L TV should automatically power off or enter standby mode via HDMI-CEC when the Apple TV goes to sleep. Actual Results: The Apple TV sleeps, but the Sony TV remains completely powered on, requiring the use of the original Sony remote to manually turn it off. Attempted Troubleshooting (Issue Persists): Hard reset performed on both devices (completely disconnected from AC power and HDMI cables for 60 seconds).Toggled HDMI-CEC settings OFF and ON again on both the Apple TV and Sony TV.Rescanned HDMI devices within the BRAVIA Sync settings menu on the Sony TV.