After little investigation found that you should remove the container.Focus()
line of code, because the editor is actually in a popup that is not the container
itself and this way we force the focus not to go to the editor but the item that is behind it. Can you try if removing this line will work for you (The popup when is shown gets the focus by default). One more thing that can help you is the EditorPrepare
event of the TreeListViewItem class, where you can get the actual editor item and focus it.
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