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The nodes added in ObservableCollection do not have Expandable icon #1

@CaulyKan

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@CaulyKan

Hello,

Test app: https://github.com/CaulyKan/TreeListView

the test app first adds a infinite iterated children in the 'TestCollectionChanged' tab (which is working properly.)
Then after one second a new same item is added to the observableCollection, and this new item is displayed.

Expecting: Two same nodes.
Actual: the new node does not have an expandable icon.

I made a workaround but not sure it's good solution.

Thank you!

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