Closed Issue: CheckComboBox not updated properly [17714]

I'd like to set the ItemsSource of my CheckComboBox each time I selected an item from a ListView.Whenever I select a new Item without checking any Item in the CheckComboBox before, SelectorItem is not updated (LostFocus is not called!). When I switch back to that ListItem that has no checked items, the Text of CheckComboBox is not updated (it should be empty).Everything works fine, if you always check at least one item.. I am using the latest source code.