Steps to Reproduce

1. click "show popup"
2. click "close" button to close the popup
3. do step 1 and 2 for the 2nd time
4. click "rerender"

Current Result

zk.wpd:32376 Uncaught TypeError: Failed to mount: Cannot read properties of undefined (reading '0')
at $subclass$.fireX (zk.wpd:32376:20)
at $subclass$.fire (zk.wpd:32487:17)
at $subclass$.<anonymous> (zk.wpd:31813:12)
at $subclass$.unbind_ (zkbind.wpd:111:22)
at zk.load._webpack_modules../zul/src/main/resources/web/js/zul/Widget.ts.Widget.unbind (zk.wpd:39821:30)
at zk.load._webpack_modules../zul/src/main/resources/web/js/zul/wgt/Button.ts.Button.unbind (zk.wpd:41705:30)
at _webpack_modules../zk/src/main/resources/web/js/zk/widget.ts.Widget.unbindChildren (zk.wpd:31836:17)
at $subclass$.<anonymous> (zk.wpd:31793:10)
at $subclass$.unbind_ (zkbind.wpd:111:22)
at zk.load._webpack_modules../zul/src/main/resources/web/js/zul/Widget.ts.Widget.unbind (zk.wpd:39821:30)

Expected Result

no error

Debug Information

• could be caused by the fix of ZK-5455
• 9.6.5, 10.0.0 don't have this bug
• another cause could be related to removing listeners mentioned at ZK-5981

Workaround

zk-5985.js