Custom Toolbar no icons in menu

When my custom toolbar is too small, the chevron comes up.
Clicking this chevron shows the other buttons as a menu.
Good, same as with the intrinsic toolbars.

But the menu of the custom toolbar doesn’t show any icons.
The menu of an intrinsic toolbar has the icons.

I tried to find the difference, but couldn’t find out.
Someone knows?

Even not someone from McNeel?

@Gijs (perhaps)
Seems I miss an important step.
How were the intrinsic toolbars enabled to show the icons in the menu?
Can I do the same?

@Charles not sure what you are missing. If I make a custom menu from a custom toolbar, the menu icons will show for macros that have an icon. This currently doesn’t work on Mac though.

Toolbar large enough:
image

Same toolbar too small:
image

Where is the C2 icon?
image

Intrinsic toolbar:
image

got it, thanks
RH-82800 Custom Macros: not visible in cascading toolbars