Add a workaround for collection view bug.

src/Microsoft.MobileBlazorBindings/Elements/DataTemplates/DataTemplateItemComponent.cs

@@ -12,13 +12,13 @@ namespace Microsoft.MobileBlazorBindings.Elements.DataTemplates
     internal class DataTemplateItemComponent<T> : ComponentBase
 #pragma warning restore CA1812 // Avoid uninstantiated internal classes
     {
-        private MC.ContentView _contentView;
+        private MC.VerticalStackLayout _contentView;
         private object _item;
 
         [Parameter] public RenderFragment<T> Template { get; set; }
 
         [Parameter]
-        public MC.ContentView ContentView
+        public MC.VerticalStackLayout ContentView
         {
             get
             {

src/Microsoft.MobileBlazorBindings/Elements/DataTemplates/DataTemplateItemsComponent.cs

@@ -18,9 +18,9 @@ namespace Microsoft.MobileBlazorBindings.Elements.DataTemplates
 
             foreach (var itemRoot in _itemRoots)
             {
-                builder.OpenComponent<InitializedContentView>(1);
+                builder.OpenComponent<InitializedVerticalStackLayout>(1);
 
-                builder.AddAttribute(2, nameof(InitializedContentView.NativeControl), itemRoot);
+                builder.AddAttribute(2, nameof(InitializedVerticalStackLayout.NativeControl), itemRoot);
                 builder.AddAttribute(3, "ChildContent", (RenderFragment)(builder =>
                 {
                     builder.OpenComponent<DataTemplateItemComponent<T>>(4);
@@ -39,9 +39,9 @@ namespace Microsoft.MobileBlazorBindings.Elements.DataTemplates
         [Parameter] public string ElementName { get; set; }
         [Parameter] public RenderFragment<T> Template { get; set; }
 
-        private readonly List<MC.ContentView> _itemRoots = new List<MC.ContentView>();
+        private readonly List<MC.VerticalStackLayout> _itemRoots = new();
 
-        public void Add(MC.ContentView templateRoot)
+        public void Add(MC.VerticalStackLayout templateRoot)
         {
             _itemRoots.Add(templateRoot);
             StateHasChanged();

src/Microsoft.MobileBlazorBindings/Elements/DataTemplates/InitializedVerticalStackLayout.cs

@@ -9,15 +9,18 @@ using MC = Microsoft.Maui.Controls;
 namespace Microsoft.MobileBlazorBindings.Elements.DataTemplates
 {
 #pragma warning disable CA1812 // Avoid uninstantiated internal classes. Class is used as generic parameter.
-    internal class InitializedContentView : ContentView
+    internal class InitializedVerticalStackLayout : VerticalStackLayout
 #pragma warning restore CA1812 // Avoid uninstantiated internal classes
     {
-        [Parameter] public new MC.ContentView NativeControl { get; set; }
+        // ContentView was originally used here.
+        // It was replaced with VerticalStackLayout as a workaround for bug
+        // https://github.com/dotnet/maui/issues/5248.
+        [Parameter] public new MC.VerticalStackLayout NativeControl { get; set; }
 
-        static InitializedContentView()
+        static InitializedVerticalStackLayout()
         {
-            ElementHandlerRegistry.RegisterElementHandler<InitializedContentView>(
-                (renderer, _, component) => new ContentViewHandler(renderer, component.NativeControl));
+            ElementHandlerRegistry.RegisterElementHandler<InitializedVerticalStackLayout>(
+                (renderer, _, component) => new VerticalStackLayoutHandler(renderer, component.NativeControl));
         }
     }
 }

src/Microsoft.MobileBlazorBindings/Elements/DataTemplates/MbbDataTemplate.cs

@@ -10,9 +10,9 @@ namespace Microsoft.MobileBlazorBindings.Elements.DataTemplates
         public MbbDataTemplate(DataTemplateItemsComponent<T> dataTemplateItemsAccessor)
             : base(() =>
             {
-                var contentView = new MC.ContentView();
-                dataTemplateItemsAccessor.Add(contentView);
-                return contentView;
+                var itemRootView = new MC.VerticalStackLayout();
+                dataTemplateItemsAccessor.Add(itemRootView);
+                return itemRootView;
             })
         {
         }