A very minor bug happened on the way to kill Lightbringer. While waiting for others to show up to kill Lightbringer (Shrine of the Reforged), I had my guy playing the lute to kill time. When the battle was engaged I continued playing music. The music went on while I located and dug up treasure 1, and then while I assisted with killing a dragon in the Pridehome area. It only relented when I used the wayshrine to travel to Senchal.
The continuing music is a minor glitch, and for the most part I like the "lute" work, but a glitch is a glitch...
PS4, North America server.