TabBar selection indicator does not move to selected item when using ItemsSource

[kazo0]

When setting the ItemsSource property on the TabBar to a simple list of strings instead of creating the TabBarItem container explicitly, the selection indicator does not properly update to the currently selected item, it just stays stuck at the first item in the list

DataContext:

public List<string> Items => new List<string> { "Tab 1", "Tab 2", "Tab 3" };

XAML:

<utu:TabBar SelectedIndex="2"
			Background="LightBlue"
			ItemsSource="{x:Bind Items}">
	<utu:TabBar.SelectionIndicatorContentTemplate>
		<DataTemplate>
			<Border Height="2"
					VerticalAlignment="Bottom"
					Background="Red" />
		</DataTemplate>
	</utu:TabBar.SelectionIndicatorContentTemplate>
</utu:TabBar>

Current Behavior

Expected Behavior