Similar to the property in the ComboBox

1.Run the provided code below which focuses the RadDropDownList

2.Press the down key which is supposed to select the second item. - Item is not selected

3.Press again the down key - second item is selected.

     <script>
            function pageLoad() {
                $get('RadDropDownList1').focus();
            }
        </script>
        <asp:TextBox ID="Textbox1" runat="server" />
        <telerik:RadDropDownList ID="RadDropDownList1" runat="server" TabIndex="11">
            <Items>
                <telerik:DropDownListItem Text="item 1" />
                <telerik:DropDownListItem Text="item 2" />
            </Items>
        </telerik:RadDropDownList>

I am using 2013.2.918 and this is working.  I tried to upgrade to 2013.3.1324 and it is no longer working.  Please see attached.  Do you know how I can work-around this or is this a known issue?

Application Scenario:  We have a large page, that we are wanting to improve the performance on.  We have a few drop downs that change there available options based on the selections of another drop down. 

We retrieve the values of the second item though JSON and a generic handler.  We generate the items for the drop down list, and then post  the final values back when the user is finished.

The problem we have is that the user selected item is lost between client and server click actions.

I provided a sample scenario that illustrates the problem, and the basic application of this scenario.

The drop down does have all the client populated items, but the item that is selected is not retained.

Our temporary work around is to store the selected item in a hidden field and read from that which does keep it's value.

add min-dropdownheight and max-dropdownheight to raddropdownlist (to let it "grow" until a max-height

At the moment RadDropDownList can be bound for a Web Service, but there are no Client Events which allow developers to handle and control actions happening during the data binding process. For example:

 -  Event fired, before the request is made (OnClientItemRequesting).
 -  Event fired, after the response is received (OnClientItemRequested).
 -  Event fired if the request call has failed (OnClientItemRequestFailed).