Clear platform view's background when MAUI's background is null

src/Controls/tests/DeviceTests/Elements/Label/LabelTests.cs

@@ -335,6 +335,35 @@ namespace Microsoft.Maui.DeviceTests
 			});
 		}
 
+		[Fact]
+		public async Task SetBackgroundToNullAffectsRendering()
+		{
+			SetupBuilder();
+
+			Label label;
+			var layout = new VerticalStackLayout
+			{
+				(label = new Label
+				{
+					WidthRequest = 200,
+					HeightRequest = 100,
+					Text = "Label",
+					TextColor = Colors.Red,
+					Background = new SolidColorBrush(Colors.Blue),
+				})
+			};
+
+			await AttachAndRun(layout, async (handler) =>
+			{
+				var platformView = handler.ToPlatform();
+				await platformView.AssertContainsColor(Colors.Blue, MauiContext);
+
+				label.Background = null;
+
+				await platformView.AssertDoesNotContainColor(Colors.Blue, MauiContext);
+			});
+		}
+
 		[Theory(
 #if WINDOWS
 		Skip = "Fails on Windows"

src/Core/src/Platform/Android/ViewExtensions.cs

@@ -271,16 +271,14 @@ namespace Microsoft.Maui.Platform
 		{
 			var paint = background;
 
-			if (!paint.IsNullOrEmpty())
-			{
 			// Remove previous background gradient if any
-				if (platformView.Background is MauiDrawable mauiDrawable)
+			(platformView.Background as MauiDrawable)?.Dispose();
+
+			if (paint.IsNullOrEmpty())
 			{
 				platformView.Background = null;
-					mauiDrawable.Dispose();
 			}
-
-				if (treatTransparentAsNull && paint.IsTransparent())
+			else if (treatTransparentAsNull && paint.IsTransparent())
 			{
 				// For controls where android treats transparent as null it's more
 				// performant to just set the background to null instead of
@@ -298,11 +296,6 @@ namespace Microsoft.Maui.Platform
 					platformView.Background = drawable;
 			}
 		}
-			else if (platformView is LayoutViewGroup)
-			{
-				platformView.Background = null;
-			}
-		}
 
 		public static void UpdateOpacity(this AView platformView, IView view) => platformView.UpdateOpacity(view.Opacity);
 

src/Core/src/Platform/iOS/ViewExtensions.cs

@@ -77,14 +77,9 @@ namespace Microsoft.Maui.Platform
 
 			if (paint.IsNullOrEmpty())
 			{
-				if (platformView is LayoutView)
 				platformView.BackgroundColor = null;
-				else
-					return;
 			}
-
-
-			if (paint is SolidPaint solidPaint)
+			else if (paint is SolidPaint solidPaint)
 			{
 				Color backgroundColor = solidPaint.Color;
 
@@ -92,8 +87,6 @@ namespace Microsoft.Maui.Platform
 					platformView.BackgroundColor = ColorExtensions.BackgroundColor;
 				else
 					platformView.BackgroundColor = backgroundColor.ToPlatform();
-
-				return;
 			}
 			else if (paint is GradientPaint gradientPaint)
 			{