Revert "Shell Tab is still visible after set Tab.IsVisible to false"

src/Controls/src/Core/Compatibility/Handlers/Shell/Android/ShellItemRenderer.cs

@@ -295,13 +295,7 @@ protected override void OnDisplayedPageChanged(Page newPage, Page oldPage)
 				oldPage.PropertyChanged -= OnDisplayedElementPropertyChanged;
 
 			if (newPage is not null)
-			{
 				newPage.PropertyChanged += OnDisplayedElementPropertyChanged;
-				if (oldPage is null)
-				{
-					_menuSetup = false;
-				}
-			}
 
 			if (newPage is not null && !_menuSetup)
 			{

src/Controls/src/Core/Compatibility/Handlers/Shell/iOS/ShellItemRenderer.cs

@@ -357,10 +357,6 @@ void GoTo(ShellSection shellSection)
 			if (shellSection == null || _currentSection == shellSection)
 				return;
 			var renderer = RendererForShellContent(shellSection);
-
-			if (renderer == null)
-				return;
-
 			if (renderer?.ViewController != SelectedViewController)
 				SelectedViewController = renderer.ViewController;
 			CurrentRenderer = renderer;

src/Controls/src/Core/Handlers/Shell/ShellItemHandler.Windows.cs

@@ -432,7 +432,7 @@ void OnCurrentShellSectionPropertyChanged(object? sender, System.ComponentModel.
 			if (_mainLevelTabs == null)
 				return;
 
-			var currentItem = VirtualView.CurrentItem?.CurrentItem;
+			var currentItem = VirtualView.CurrentItem.CurrentItem;
 			NavigationViewItemViewModel? navigationViewItemViewModel = null;
 
 			foreach (var item in _mainLevelTabs)

src/Controls/src/Core/Shell/ShellItem.cs

@@ -284,10 +284,7 @@ static void OnCurrentItemChanged(BindableObject bindable, object oldValue, objec
 			var shellItem = (ShellItem)bindable;
 
 			if (newValue == null)
-			{
-				shellItem.CurrentItem = null;
 				return;
-			}
 
 			if (shellItem.Parent is Shell)
 			{