onOK/onCancel/ctrlKeys prevent widget input

run the attached example the lower text box listens to onOK, onCancel, ctrlKeys -> no characters can be typed

the suspected bugfix causing this side effect is ZK-2435 and the related commit
https://github.com/zkoss/zk/commit/f1844d18a644abb1d12a62769d5edc8f5a3284f1

the example is using textbox -> since the change is in Widget.js I assume every widget is affected when listening to onOK or onCancel or even ctrlKeys ...