Widgets with opacity 0 are not being shown when highlight repaints is selected

I made a (stupid) mistake and used a spinner inside a stack with animated opacity to fade in smoothly.
I saw that my app was using a lot of compute power when I thought nothing was being rendered because the "highlight repaint" feature did not highlight any repaints. In fact the spinner was constantly being rendered but I didnt spot my (stupid) mistake with the animated opacity.
IMO it would be cool if highlight repaint could somehow still highlight repaints even when the opacity is 0 (transparent pixels?)
Thanks for developing this tool and best regards :)