QGraphicsItem: When a parent item has ItemHasNoContents and ItemClipsChildrenToShape set then it doesn't always update the children

QGraphicsItem: When a parent item has ItemHasNoContents set then it doesn't always update the children when a change occurs on the parent. In the attached example, the parent has ItemHasNoContents set and ItemClipsChildrenToShape and the child item is just a normal rect item. When the parent item is hidden with setVisible(false) then the child item is still visible.