How do I get disable on form to cascade down to CanvasItem?

I have a form embedded in a CanvasItem.

When I disable the parent form (or any parent component for that matter), I expect that the form inside the CanvasItem is disabled as well.

And for the most part, this works. EXCEPT for the first time. The first time I disable the parent form, the child form does get disabled but the style is not greyed out. Its not unless I enable and disable it again that the style changes.

I assume this is some sort of redraw issue, but I don't see any draw handler on CanvasItem. How can I fix this?

Thanks.