[DB42]

Same without adjust refresh rate?

Is this directed to my question?  What does adjust refresh rate have to do with loosing audio?  If it wasn't directed towards my question I apologize.

If you change refreshrate, the hdmi edid information is shortly lost and when display comes back it's resynced. Certain devices (AVRs, streaming sticks) have issues with that. As they don't properly return connected after the edid information is back. That's the background why it directly influences audio.

Therefore: Disable refreshrate switching and try again.

Thank you for your advice and help fritsch. I appreciate it.