Accordion Tabbox after rapid clicking on tabs start displaying content at fixed wrong hight.

To reproduce, just go to http://www.zkoss.org/zksandbox/#l10 and add some more tabs for accordion. Content of the tabpanel will be displayed correctly. If some one start rapidly clicking on random tabs in that accordion bug happens and content of the tab start displaying at wrong fixed height no matter what tabs we are clicking. Bug can be reprodused in any browser.