Hi @William_Ip ----- Thank you for the report and the feedback, both are appreciated!
Moving forward, to help aide in my evaluation of this behavior you are experiencing may I kindly ask you for the following:
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An expanded description of your current setup as seen here.
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A screenshot of your “audio” tab highlighting the issue.
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Besides the firmware update on the Zenith, have any other changes been made recently or is this the only once since noticing this behavior? Furthermore, in your troubleshooting of this issue, have you tried rolling back to the previous firmware version to confirm if functionality returns to the device?
-Eric