Quick Controls don't work on instrument child tracks

I set up Volume and Pan as quick controls on the child instrument tracks. When I try to adjust via midi remote, only the main instrument track responds. Yes I am changing the track selection before trying.

Can someone please do a simple test so I know I’m not the only one?

What is a “child instrument track”?

Instrument tracks in a multi output instrument other than the main one.

Could you please upload a screenshot of your project here?