02-21-2022, 02:06 AM
#1 - AFAIK there is no such "standby mode" capability in RaspiOS where the OS is cached to RAM and all the ports powered down waiting for some sort of startup signal. It sounds like your Denon is automatically switching to whatever it thinks is the active HDMI port.
#2 - PM a download link to a sample file to both @TheOldPresbyope and me so we can analyze the file and see if your issue can be reproduced in our environments.
#2 - PM a download link to a sample file to both @TheOldPresbyope and me so we can analyze the file and see if your issue can be reproduced in our environments.