Hi @SVinTO and @Jason_Gallier,
The behavior you are describing (Error 526 / “Not Ready” status) is a known issue we are currently tracking. In most cases, this is a display glitch, and ARC functionality often remains intact for playback.
To consolidate reports and provide updates more efficiently, we are closing this thread. Please follow the main tracking topic for the latest status on the fix.
Thank you for your understanding.