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Dropdown Popup not opening with OnOpen Event Binding

 When sets an empty data source on button click, the dropdown popup fails to open with a single click on the dropdown icon. The popup opens only after three clicks. This issue surfaces specifically when the OnOpen event is bound, even if it's empty.

Replication Procedure:
  1. Run the sample 
  2. Click the button 
  3. Now tried to open the popup using dropdown icon 
  4. See the issue. 


Expected Output: The dropdown popup should open with a single click on the dropdown icon, irrespective of the OnOpen event binding.

    Current Output: The dropdown popup only opens after three clicks when the OnOpen event is bound.