Steps to Reproduce

http://zkfiddle.org/sample/3g7j14l/4-include-messagebox-bug
click "show and refresh"
close messagebox
click "show and refresh" again

Current Result

messagebox doesn't show up

Expected Result

messagebox should show up

Debug Info

Messagebox is created inside the included page.
When include src is changed, include components are dropped from working component tree and a new page without messagebox is sent to AuWriter

Root Cause

org.zkoss.zk.ui.impl.AbstractExecution.getCurrentPage() will return included page when creating the Messagebox, since Messagebox.show doesn't specify the root page.

Workaround

Use include in instant mode
>> can't use ?par=val in include src URL as this force defer mode
To refresh include, use setSrc(null);setSrc(actualPath) instead