diff --git a/src/Controls/src/Core/Handlers/Items/iOS/ObservableGroupedSource.cs b/src/Controls/src/Core/Handlers/Items/iOS/ObservableGroupedSource.cs
index 59f98cda53a7..c42f5f3a4aad 100644
--- a/src/Controls/src/Core/Handlers/Items/iOS/ObservableGroupedSource.cs
+++ b/src/Controls/src/Core/Handlers/Items/iOS/ObservableGroupedSource.cs
@@ -315,11 +315,6 @@ void Move(NotifyCollectionChangedEventArgs args)
 
 		int GetGroupCount(int groupIndex)
 		{
-			if (groupIndex < 0 || groupIndex >= _groupSource.Count)
-			{
-				return 0;
-			}
-
 			switch (_groupSource[groupIndex])
 			{
 				case IList list:
@@ -339,11 +334,6 @@ int GetGroupCount(int groupIndex)
 
 		object GetGroupItemAt(int groupIndex, int index)
 		{
-			if (groupIndex < 0 || groupIndex >= _groupSource.Count)
-			{
-				return -1;
-			}
-
 			switch (_groupSource[groupIndex])
 			{
 				case IList list:
diff --git a/src/Controls/src/Core/Handlers/Items/iOS/ObservableItemsSource.cs b/src/Controls/src/Core/Handlers/Items/iOS/ObservableItemsSource.cs
index e7faa936fce3..1a8d7e7a76ac 100644
--- a/src/Controls/src/Core/Handlers/Items/iOS/ObservableItemsSource.cs
+++ b/src/Controls/src/Core/Handlers/Items/iOS/ObservableItemsSource.cs
@@ -314,7 +314,7 @@ void Update(Action<UICollectionView> update, NotifyCollectionChangedEventArgs ar
 				return;
 
 			var collectionView = controller.CollectionView;
-			if (collectionView.Hidden || collectionView.Window == null)
+			if (collectionView.Hidden)
 			{
 				return;
 			}
diff --git a/src/Controls/tests/TestCases.Android.Tests/snapshots/android/BlankScreenOnNavigationBack.png b/src/Controls/tests/TestCases.Android.Tests/snapshots/android/BlankScreenOnNavigationBack.png
new file mode 100644
index 000000000000..3dcc839ddcf5
Binary files /dev/null and b/src/Controls/tests/TestCases.Android.Tests/snapshots/android/BlankScreenOnNavigationBack.png differ
diff --git a/src/Controls/tests/TestCases.HostApp/Issues/Issue27797.xaml b/src/Controls/tests/TestCases.HostApp/Issues/Issue27797.xaml
deleted file mode 100644
index 865fb801a1e9..000000000000
--- a/src/Controls/tests/TestCases.HostApp/Issues/Issue27797.xaml
+++ /dev/null
@@ -1,34 +0,0 @@
-<?xml version="1.0" encoding="utf-8" ?>
-<ContentPage
-  xmlns="http://schemas.microsoft.com/dotnet/2021/maui"
-  xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
-  x:Class="Maui.Controls.Sample.Issues.Issue27797">
-  <Grid>
-    <CollectionView IsGrouped="True"
-                    ItemsSource="{Binding GroupedWorkItems}">
-      <CollectionView.GroupHeaderTemplate>
-        <DataTemplate>
-          <Grid BackgroundColor="LightGray">
-            <Label
-              Margin="10"
-              FontAttributes="Bold"
-              Text="{Binding GroupDescription}"
-              VerticalOptions="Center"/>
-          </Grid>
-        </DataTemplate>
-      </CollectionView.GroupHeaderTemplate>
-      <CollectionView.ItemTemplate>
-        <DataTemplate>
-          <Grid ColumnDefinitions="*,Auto,Auto">
-            <Label Margin="20,5"
-                   Text="{Binding Description}">
-              <Label.GestureRecognizers>
-                <TapGestureRecognizer Tapped="TapGestureRecognizer_Tapped"/>
-              </Label.GestureRecognizers>
-            </Label>
-          </Grid>
-        </DataTemplate>
-      </CollectionView.ItemTemplate>
-    </CollectionView>
-  </Grid>
-</ContentPage>
\ No newline at end of file
diff --git a/src/Controls/tests/TestCases.HostApp/Issues/Issue27797.xaml.cs b/src/Controls/tests/TestCases.HostApp/Issues/Issue27797.xaml.cs
deleted file mode 100644
index 127e1eca18d0..000000000000
--- a/src/Controls/tests/TestCases.HostApp/Issues/Issue27797.xaml.cs
+++ /dev/null
@@ -1,260 +0,0 @@
-using System.Collections.ObjectModel;
-
-namespace Maui.Controls.Sample.Issues;
-[Issue(IssueTracker.Github, 27797, "CollectionView with grouped data crashes on iOS when the groups change", PlatformAffected.iOS)]
-public class Issue27797NavigationPage : NavigationPage
-{
-	public Issue27797NavigationPage() : base(new Issue27797()) { }
-}
-
-public partial class Issue27797 : ContentPage
-{
-	public Issue27797()
-	{
-		InitializeComponent();
-		BindingContext = new MainViewModel();
-	}
-
-	private void TapGestureRecognizer_Tapped(object sender, TappedEventArgs e)
-	{
-		DetailPage detailPage = new();
-		var workItemViewModel = (sender as VisualElement).BindingContext;
-		detailPage.BindingContext = workItemViewModel;
-		Navigation.PushAsync(detailPage);
-	}
-
-	public class DetailPage : ContentPage
-	{
-		public DetailPage()
-		{
-			Title = "DetailPage";
-			BindingContext = new WorkItemViewModel();
-
-			var statusLabel = new Label
-			{
-				FontAttributes = FontAttributes.Bold,
-				FontSize = 20,
-				HorizontalOptions = LayoutOptions.Center
-			};
-			statusLabel.SetBinding(Label.TextProperty, "Status");
-
-			var descriptionLabel = new Label
-			{
-				FontSize = 16,
-				HorizontalOptions = LayoutOptions.Center
-			};
-			descriptionLabel.SetBinding(Label.TextProperty, "Description");
-
-			var todoButton = new Button
-			{
-				Text = "TODO",
-				AutomationId = "TODO"
-			};
-			todoButton.SetBinding(Button.CommandProperty, "ChangeStatusCommand");
-			todoButton.SetBinding(Button.CommandParameterProperty, new Binding { Source = "TODO" });
-
-			var activeButton = new Button
-			{
-				Text = "ACTIVE",
-				AutomationId = "ACTIVE"
-			};
-			activeButton.SetBinding(Button.CommandProperty, "ChangeStatusCommand");
-			activeButton.SetBinding(Button.CommandParameterProperty, new Binding { Source = "ACTIVE" });
-
-			var doneButton = new Button
-			{
-				Text = "DONE",
-				AutomationId = "DONE",
-			};
-			doneButton.SetBinding(Button.CommandProperty, "ChangeStatusCommand");
-			doneButton.SetBinding(Button.CommandParameterProperty, new Binding { Source = "DONE" });
-
-			var buttonLayout = new HorizontalStackLayout
-			{
-				HorizontalOptions = LayoutOptions.Center,
-				Spacing = 5,
-				Children = { todoButton, activeButton, doneButton }
-			};
-
-			var mainLayout = new VerticalStackLayout
-			{
-				Spacing = 10,
-				Children = { statusLabel, descriptionLabel, buttonLayout }
-			};
-
-			Content = mainLayout;
-		}
-	}
-
-	public class MainViewModel : BindableObject
-	{
-		private List<WorkItemViewModel> _workItems = new();
-
-		private ObservableCollection<WorkItemGroupViewModel> _groupedWorkItems = new();
-		public ObservableCollection<WorkItemGroupViewModel> GroupedWorkItems
-		{
-			get => _groupedWorkItems;
-			set { _groupedWorkItems = value; OnPropertyChanged(); }
-		}
-
-		static readonly string StatusTODO = "TODO";
-		static readonly string StatusACTIVE = "ACTIVE";
-		static readonly string StatusDONE = "DONE";
-
-		WorkItemGroupViewModel _todoGroup = new(StatusTODO);
-		WorkItemGroupViewModel _activeGroup = new(StatusACTIVE);
-		WorkItemGroupViewModel _doneGroup = new(StatusDONE);
-
-		public MainViewModel()
-		{
-			CreateWorkItemData();
-			UpdateGroupedWorkItems();
-		}
-
-		private void UpdateGroupedWorkItems()
-		{
-			foreach (var item in _workItems)
-			{
-				if (item.Status == StatusTODO && !_todoGroup.Contains(item))
-				{
-					_todoGroup.Add(item);
-				}
-				else if (item.Status == StatusACTIVE && !_activeGroup.Contains(item))
-				{
-					// move any existing active item back to TODO
-					if (_activeGroup.Any())
-					{
-						var currentActiveItem = _activeGroup[0];
-						_activeGroup.Remove(currentActiveItem);
-						currentActiveItem.Status = StatusTODO;
-						_todoGroup.Add(currentActiveItem);
-					}
-					_activeGroup.Add(item);
-				}
-				else if (item.Status == StatusDONE && !_doneGroup.Contains(item))
-				{
-					_doneGroup.Add(item);
-				}
-			}
-
-			if (_todoGroup.Any())
-			{
-				if (!GroupedWorkItems.Contains(_todoGroup))
-					GroupedWorkItems.Add(_todoGroup);
-			}
-			else if (GroupedWorkItems.Contains(_todoGroup))
-			{
-				GroupedWorkItems.Remove(_todoGroup);
-			}
-
-			if (_activeGroup.Any())
-			{
-				// ACTIVE always at top
-				if (!GroupedWorkItems.Contains(_activeGroup))
-					GroupedWorkItems.Insert(0, _activeGroup);
-			}
-			else if (GroupedWorkItems.Contains(_activeGroup))
-			{
-				GroupedWorkItems.Remove(_activeGroup);
-			}
-
-			if (_doneGroup.Any())
-			{
-				if (!GroupedWorkItems.Contains(_doneGroup))
-					GroupedWorkItems.Add(_doneGroup);
-			}
-			else if (GroupedWorkItems.Contains(_doneGroup))
-			{
-				GroupedWorkItems.Remove(_doneGroup);
-			}
-		}
-
-		private bool _statusUpdatesInProgress = false;
-		private void WorkItem_PropertyChanged(object sender, System.ComponentModel.PropertyChangedEventArgs e)
-		{
-			if (_statusUpdatesInProgress)
-				return;
-
-			if (sender is not WorkItemViewModel workItem)
-				return;
-
-			if (e.PropertyName == nameof(WorkItemViewModel.Status))
-			{
-				_statusUpdatesInProgress = true;
-				RemoveItemFromOldGroup(workItem);
-
-				UpdateGroupedWorkItems();
-				_statusUpdatesInProgress = false;
-			}
-		}
-
-		private void RemoveItemFromOldGroup(WorkItemViewModel workItem)
-		{
-			if (_todoGroup.Contains(workItem))
-				_todoGroup.Remove(workItem);
-
-			if (_activeGroup.Contains(workItem))
-				_activeGroup.Remove(workItem);
-
-			if (_doneGroup.Contains(workItem))
-				_doneGroup.Remove(workItem);
-		}
-
-		private void CreateWorkItemData()
-		{
-			var cleanHouse = new WorkItemViewModel
-			{
-				Description = "CleanHouse",
-				Status = StatusDONE
-			};
-			cleanHouse.PropertyChanged += WorkItem_PropertyChanged;
-			_workItems.Add(cleanHouse);
-
-			var doLaundry = new WorkItemViewModel
-			{
-				Description = "DoLaundry",
-				Status = StatusDONE
-			};
-			doLaundry.PropertyChanged += WorkItem_PropertyChanged;
-			_workItems.Add(doLaundry);
-
-			var mowLawn = new WorkItemViewModel
-			{
-				Description = "MowLawn",
-				Status = StatusTODO
-			};
-			mowLawn.PropertyChanged += WorkItem_PropertyChanged;
-			_workItems.Add(mowLawn);
-
-		}
-	}
-
-	public class WorkItemGroupViewModel : ObservableCollection<WorkItemViewModel>
-	{
-		public WorkItemGroupViewModel(string groupDescription)
-		{
-			GroupDescription = groupDescription;
-		}
-
-		public string GroupDescription { get; }
-	}
-
-	public class WorkItemViewModel : BindableObject
-	{
-		private string _description;
-		public string Description
-		{
-			get => _description;
-			set { _description = value; OnPropertyChanged(); }
-		}
-
-		private string _status;
-		public string Status
-		{
-			get => _status;
-			set { _status = value; OnPropertyChanged(); }
-		}
-		public Command<string> ChangeStatusCommand => new((newStatus) => Status = newStatus);
-	}
-}
-
diff --git a/src/Controls/tests/TestCases.HostApp/Issues/Issue28098.xaml b/src/Controls/tests/TestCases.HostApp/Issues/Issue28098.xaml
new file mode 100644
index 000000000000..0e940a165773
--- /dev/null
+++ b/src/Controls/tests/TestCases.HostApp/Issues/Issue28098.xaml
@@ -0,0 +1,37 @@
+<?xml version="1.0" encoding="utf-8" ?>
+<ContentPage xmlns="http://schemas.microsoft.com/dotnet/2021/maui"
+             xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
+             x:Class="Maui.Controls.Sample.Issues.Issue28098"
+             xmlns:local="clr-namespace:Maui.Controls.Sample.Issues"
+             Title="Issue28098">
+    <ContentPage.BindingContext>
+        <local:MainPageViewModel x:Name="_viewModel"/>
+    </ContentPage.BindingContext>
+    <StackLayout Margin="20">
+        <Button Clicked="Button_Clicked"
+                AutomationId="Button"
+                Text="Button"/>
+        <CarouselView  WidthRequest="350"
+                       HeightRequest="570"
+                       HorizontalOptions="Fill"
+                       VerticalOptions="Fill"
+                       ItemsSource="{Binding Items}"
+                       Loop="False">
+            <CarouselView.ItemTemplate>
+                <DataTemplate>
+                    <StackLayout>
+                        <Image Source="dotnet_bot.png"
+                               WidthRequest="200"
+                               HeightRequest="200"
+                               Aspect="AspectFill"/>
+                        <Label Padding="10"
+                               VerticalOptions="Center"
+                               HorizontalOptions="Center"
+                               Text="{Binding Name}"/>
+                    </StackLayout>
+                </DataTemplate>
+            </CarouselView.ItemTemplate>
+        </CarouselView>
+
+    </StackLayout>
+</ContentPage>
\ No newline at end of file
diff --git a/src/Controls/tests/TestCases.HostApp/Issues/Issue28098.xaml.cs b/src/Controls/tests/TestCases.HostApp/Issues/Issue28098.xaml.cs
new file mode 100644
index 000000000000..87ed1c223fd1
--- /dev/null
+++ b/src/Controls/tests/TestCases.HostApp/Issues/Issue28098.xaml.cs
@@ -0,0 +1,61 @@
+using System.Collections.ObjectModel;
+
+namespace Maui.Controls.Sample.Issues;
+
+[Issue(IssueTracker.Github, 28098, "Returning back from navigation to MainPage would result in a blank screen", PlatformAffected.iOS)]
+public partial class Issue28098 : ContentPage
+{
+	public Issue28098()
+	{
+		InitializeComponent();
+	}
+
+	protected override void OnAppearing()
+	{
+		base.OnAppearing();
+		_viewModel.OnAppearing();
+	}
+	private async void Button_Clicked(object sender, EventArgs e)
+	{
+		await Navigation.PushModalAsync(new ActionPage());
+	}
+}
+
+public class ActionPage : ContentPage
+{
+	public ActionPage()
+	{
+		var button = new Button { Text = "GoBack", AutomationId = "BackButton" };
+		button.Clicked += async (s, e) => await Navigation.PopModalAsync();
+		Content = button;
+	}
+}
+
+public class MainPageViewModel
+{
+	public Command LoadItemsCommand { get; }
+	public ObservableCollection<Item> Items { get; }
+
+	public void OnAppearing()
+	{
+		LoadItemsCommand.Execute(null);
+	}
+
+	void ExecuteLoadItemsCommand()
+	{
+		Items.Clear();
+		Items.Add(new Item() { Name = "Item1" });
+		Items.Add(new Item() { Name = "Item2" });
+	}
+	public MainPageViewModel()
+	{
+		Items = new ObservableCollection<Item>();
+
+		LoadItemsCommand = new Command(() => ExecuteLoadItemsCommand());
+	}
+}
+
+public class Item
+{
+	public string Name { get; set; }
+}
\ No newline at end of file
diff --git a/src/Controls/tests/TestCases.Shared.Tests/Tests/Issues/Issue27797.cs b/src/Controls/tests/TestCases.Shared.Tests/Tests/Issues/Issue27797.cs
deleted file mode 100644
index beb3ab93a4fc..000000000000
--- a/src/Controls/tests/TestCases.Shared.Tests/Tests/Issues/Issue27797.cs
+++ /dev/null
@@ -1,27 +0,0 @@
-using NUnit.Framework;
-using UITest.Appium;
-using UITest.Core;
-
-namespace Microsoft.Maui.TestCases.Tests.Issues
-{
-	public class Issue27797 : _IssuesUITest
-	{
-		public Issue27797(TestDevice testDevice) : base(testDevice)
-		{
-		}
-
-		public override string Issue => "CollectionView with grouped data crashes on iOS when the groups change";
-
-		[Test]
-		[Category(UITestCategories.ListView)]
-		public void AppShouldNotCrashWhenModifyingCollectionView()
-		{
-			App.WaitForElement("CleanHouse");
-			App.Click("MowLawn");
-			App.WaitForElement("ACTIVE");
-			App.Click("ACTIVE");
-			App.Click("TODO");
-			App.Back();
-		}
-	}
-}
\ No newline at end of file
diff --git a/src/Controls/tests/TestCases.Shared.Tests/Tests/Issues/Issue28098.cs b/src/Controls/tests/TestCases.Shared.Tests/Tests/Issues/Issue28098.cs
new file mode 100644
index 000000000000..fe91fbc237a1
--- /dev/null
+++ b/src/Controls/tests/TestCases.Shared.Tests/Tests/Issues/Issue28098.cs
@@ -0,0 +1,23 @@
+using NUnit.Framework;
+using UITest.Appium;
+using UITest.Core;
+
+namespace Microsoft.Maui.TestCases.Tests.Issues;
+public class Issue28098 : _IssuesUITest
+{
+    public override string Issue => "Returning back from navigation to MainPage would result in a blank screen";
+    public Issue28098(TestDevice device) : base(device)
+    {
+    }
+
+    [Test]
+    [Category(UITestCategories.Picker)]
+    public void BlankScreenOnNavigationBack()
+    {
+        App.WaitForElement("Button");
+        App.Tap("Button");
+        App.WaitForElement("BackButton");
+        App.Tap("BackButton");
+        VerifyScreenshot();
+    }
+}
\ No newline at end of file
diff --git a/src/Controls/tests/TestCases.WinUI.Tests/snapshots/windows/BlankScreenOnNavigationBack.png b/src/Controls/tests/TestCases.WinUI.Tests/snapshots/windows/BlankScreenOnNavigationBack.png
new file mode 100644
index 000000000000..0ec880a22c34
Binary files /dev/null and b/src/Controls/tests/TestCases.WinUI.Tests/snapshots/windows/BlankScreenOnNavigationBack.png differ
diff --git a/src/Controls/tests/TestCases.iOS.Tests/snapshots/ios/BlankScreenOnNavigationBack.png b/src/Controls/tests/TestCases.iOS.Tests/snapshots/ios/BlankScreenOnNavigationBack.png
new file mode 100644
index 000000000000..9212026da1d4
Binary files /dev/null and b/src/Controls/tests/TestCases.iOS.Tests/snapshots/ios/BlankScreenOnNavigationBack.png differ