- 
    Type:Bug 
- 
    Resolution: Duplicate
- 
    Priority:Normal 
- 
    None
- 
    Affects Version/s: 8.6.2, 9.5.1.1
- 
    Component/s: Components, Databind 2
- 
    Security Level: Jimmy
- 
        None
Steps to Reproduce
1. load the attached zul
2. click the refresh button
Current Result
the selected item becomes group1-option 2
Expected Result
group1-option 1
Debug Information
1. the case just reload the whole groups model with @NotifyChange, the selection changes unexpectedly.
2. the result has 2 selected option.
<optgroup id="p66P5" class="z-optgroup" label="group 1"> <option id="p66P9" class="z-option" selected="selected">group 1-option 1</option> <option id="p66Pd" class="z-option" selected="selected">group 1-option 2</option> <option id="p66Ph" class="z-option">group 1-option 3</option> <option id="p66Pl" class="z-option">group 1-option 4</option> <option id="p66Pw" class="z-option">group 1-option 5</option> </optgroup>
