When listitem has the draggable property, when user unselects the items the focus class, z-listitem-focus, is not removed from the DOM.
Please check in the this zk fiddle: http://zkfiddle.org/sample/480svq/1-Bug-listitem-focus-is-not-removed-on-unselection
In attachment is one video showing the problem.

steps to reproduce

1. run the example
2. click the check box (instead of a listitem itself) of an item to select item 0 ~ item 3
3. click the check box (instead of a listitem itself) of an item to deselect item 0 ~ item 3

result

open the developer tool to inspect those deselected 4 .z-listitem, they all have z-listitem-focus.