Ya know when you want to play a song you gotta hit tab. Wait a second for it to pop up. Then you can play. As soon as the song casts the song score turns off.
I play a minstrel, casting multiple heals in a row is a thing with Boss AoEs. Having people die because of damage, tab, wait, cast, tab. wait, cast.
Either remove the wait time or remove the auto close of the musical score. Let tab be the only way to open and close the score. Let it Auto Clear the score on cast but leave it active.