Hello there,
If you have an update for the Remote desktop client please do the update and check if there are any changes.
1.Using the Group Policy editor, Go to Computer Configuration:Administrative Templates:Windows Components: Remote Desktop Session Host:Device and Resource Redirection. Set “Limit audio playback quality.” to “Enabled,” and set “Audio Quality” option “to High”.
2.Updating your Remote Desktop App version to latest version. Or change an order version which worked before.
3.Reinstall the audio driver from the manufacturer's official website to check.
Hope this helps and please help to accept as Answer if the response is useful.
Hope this resolves your Query !!
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