[iOS][Shell]Tab becomes blank after specific navigation pattern

Author: kubaflo

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

@@ -117,6 +117,13 @@ public override void ViewDidLoad()
 				if (r != null)
 					accept = ((IShellItemController)ShellItem).ProposeSection(r.ShellSection, false);
 
+				// Detect back navigation when the user taps on the current section
+				if (r.ShellSection == _currentSection
+					&& viewController is ShellSectionRenderer sectionRenderer)
+				{
+					sectionRenderer.popRequested = true;
+				}
+
 				return accept;
 			};
 		}

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

@@ -70,7 +70,7 @@ void IAppearanceObserver.OnAppearanceChanged(ShellAppearance appearance)
 		ShellSection _shellSection;
 		bool _ignorePopCall;
 
-		bool _popRequested;
+		internal bool popRequested;
 
 		// When setting base.ViewControllers iOS doesn't modify the property right away. 
 		// if you set base.ViewControllers to a new array and then retrieve base.ViewControllers
@@ -109,7 +109,7 @@ public bool ShouldPopItem(UINavigationBar _, UINavigationItem __)
 		[Export("navigationBar:didPopItem:")]
 		[Internals.Preserve(Conditional = true)]
 		bool DidPopItem(UINavigationBar _, UINavigationItem __)
-			=> _popRequested || SendPop();
+			=> popRequested || SendPop();
 
 		internal bool SendPop()
 		{
@@ -394,7 +394,7 @@ protected virtual void OnNavigationRequested(object sender, NavigationRequestedE
 
 		protected virtual async void OnPopRequested(NavigationRequestedEventArgs e)
 		{
-			_popRequested = true;
+			popRequested = true;
 			var page = e.Page;
 			var animated = e.Animated;
 
@@ -435,7 +435,7 @@ async void ProcessPopToRoot()
 
 		protected virtual async void OnPopToRootRequested(NavigationRequestedEventArgs e)
 		{
-			_popRequested = true;
+			popRequested = true;
 			var animated = e.Animated;
 			var task = new TaskCompletionSource<bool>();
 			var pages = _shellSection.Stack.ToList();
@@ -597,7 +597,7 @@ public override UIViewController[] PopToViewController(UIViewController viewCont
 		public override void PushViewController(UIViewController viewController, bool animated)
 		{
 			_pendingViewControllers = null;
-			_popRequested = false;
+			popRequested = false;
 			if (IsInMoreTab && ParentViewController is UITabBarController tabBarController)
 			{
 				tabBarController.MoreNavigationController.PushViewController(viewController, animated);
@@ -610,7 +610,7 @@ public override void PushViewController(UIViewController viewController, bool an
 
 		public override UIViewController PopViewController(bool animated)
 		{
-			_popRequested = true;
+			popRequested = true;
 			_pendingViewControllers = null;
 			if (IsInMoreTab && ParentViewController is UITabBarController tabBarController)
 			{