The change event is not fired when using the keyboard navigation in the DropDownList, if we first click in the filtering input.
Item is selected, but the 'change' event is not triggered. If we do not focus on the filtering input, the change event will be fired. It will be fired also if the mouse is used. - screencast
The change event should always be fired when the selection in the DropDownList is changed, even if the user clicks in the filtering input.