+1. User-initiated, AI-assisted report: at my request, Codex checked local logs and browser state on my M1 Max MacBook Pro, macOS 27.0.1 (26A434). I personally confirmed that built-in speakers restored playback. Chrome and Safari could not play YouTube with HDMI audio, even after a restart. Chrome had 18 seconds buffered but stayed at 0. Logs showed timeline establishment timeout, error 1937010544, and DCPAVAudioDriver stopIOEngineGated: _hostTime=0. Failures affected EP-HDMI-RX and Dell U5226KW endpoints. This resembles FB25041393, but the identical Multi-Output trigger and root cause are unproven. Is Apple investigating?