I’ve created a separate Music Category, and the Music on Hold Class has been specified for the desired conference extension. However, when in this conference, the default music plays, versus the specified class/category. What is possibly causing this issue?
Check them and see what process is happening for the conference.
Personally, I’d tail -F /var/log/asterisk/full and try dropping into the conference. Once you get the wrong music, stop the tail. If you redirect that to a file, you’ll have a soft copy that you can edit and post here for more information.