steps to reproduce

1. load the attached example

current result

pageContent is null. ::shadow#pageContent doesn't wire the corresponding shadow element in the zul.

debug info

1. if you move <apply> out of <div>, or remove <apply id="statusBox"/>, pageContent get wired.
2. https://www.zkoss.org/wiki/ZK_Developer%27s_Reference/MVC/Controller/Wire_Components#Shadow_Selectors