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In Listview, with UI virtualization enabled the entire List View content will be re-rendered while adding the list items dynamically using the addItems public method. The UI will continue to re-render on adding the list items until expected list item count has been made available in the DOM for virtual scrolling.

We need to change this behavior for UI virtualization and we need restrict the re-rendering while adding list items to the List View and also need to ensure this behavior in all the use cases.