Given a Navigation Route organized like this:

new RouteMap("", View: views.FindByViewModel<ShellModel>(),
    Nested:
    [
        new ("Main", View: views.FindByViewModel<MainModel>(), IsDefault:true,
            Nested:
            [
                new ("Second", View: views.FindByViewModel<SecondModel>(), IsDefault:true),
                new ("Third", View: views.FindByView<ThirdPage>()),
                new ("Fourth", View: views.FindByView<FourthPage>()),
            ]
        ),
        new ("Sibling", View: views.FindByViewModel<SiblingModel>())
    ]
)

Steps to repro

• Navigate to the Third route using a TabBarNavigator from Main
• Navigate to Sibling via a button that is on the MainPage
• Navigate Back
• Observe that the navigation back leads to the MainPage being shown but it resets the selected region to be whichever nested route is set as default

Expected Outcome

The back navigation from Sibling to Main should maintain the state of the previously selected TabBarItem's region. Meaning we should be navigating back and the TabBar should have the TabBarItem connected to Third being selected

Sample app attached:
UnoApp149.zip