Steps to Reproduce

run the attached example
1. click the button "add listheader + invalidate listhead"
2. resize a column

Current Result

The following JS error is logged in the JS console:

zul.mesh.wpd:2440 Uncaught TypeError: Cannot read property 'style' of undefined
    at Object._aftersizing [as endeffect] (zul.mesh.wpd:2440)
    at init._finishDrag (zk.wpd:13724)
    at init._endDrag (zk.wpd:13789)
    at HTMLDocument._docmouseup (zk.wpd:13403)
    at HTMLDocument.dispatch (zk.wpd:5157)
    at HTMLDocument.elemData.handle (zk.wpd:4828)

Expected Result

no error

Debug Info

the error only happens if invalidate() is called on the <listhead> in the same response

Root Cause

the faker <col> are not updated and get out of synch with the <th>

Workaround

not calling invalidate() avoids the error