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.