As you can see from the image the button that has toggled state set to on is overwriting the shadow.
Can we have a transparency option for this setting please.
Then you wouldn't be able to see which buttons and menu items are on and off, which seems very counterproductive.
If you want to make a particular button not shown its on/off state, you can do that using the @toggle modifier.
The toggled state will still be visible by the highlight border
and if the colour was set to transparent then it would still be highlighted and the toolbar image would be visible.