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- CallEmbed watchdog now SELF-HEALS: a genuine ready/joined signal arriving after the 25s timeout clears the error and notifies subscribers with undefined, so a slow-but-successful EC load no longer strands the user on the recovery screen over a live call. Listener dispatch wrapped in try/catch. - ringtones: synth notes route through a per-session master gain; stop() ramps it to 0 so the ring is silenced instantly on answer instead of letting the last scheduled phrase ring out over call audio. - IncomingCallBanner: ping fires exactly once per incoming call (guarded by refEventId) instead of re-pinging when ringtone settings change mid-banner. - focusCameraParticipant: try multiple tile selectors (EC labels vary by version), defer the tile click past EC's async spotlight layout switch (rAF x2), and dev-warn when no tile matches so testers get signal. - uploadContent: a cancelled upload (mx.cancelUpload -> AbortError) is no longer treated as retryable — previously the retry loop could resurrect an upload the user just cancelled. Also retry on 408. - addRoomIdToMDirect/removeRoomIdFromMDirect: guard against a corrupt m.direct whose values aren't arrays. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>