Shortcut (U, U) Does Not Reveal Audio Property Expressions

Hello gang, I'm surprised that no one has caught this or mentioned it, or maybe it's not been that important to note. But I make a lot of templates and utilize a lot of music/sound effects in my templates. These layers are all controlled vie expresions and conditional statements so I don't have to click around so much and turn on/off layers.

I noticed that when I write expressions on audio layers and hit the keyboard shortcut (U,U) to reveal the expressions, it does not work on the audio property like it would on any other object property.

Is this a bug or intentional?