test: Validate ImageSource reopen

src/Uno.UI.RuntimeTests/Tests/Windows_UI_Xaml_Media/Given_ImageSource.cs

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+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using Microsoft.UI.Xaml.Controls;
+using static Private.Infrastructure.TestServices;
+
+namespace Uno.UI.RuntimeTests.Tests.Windows_UI_Xaml_Media;
+
+[RunsOnUIThread]
+[TestClass]
+public class Given_ImageSource
+{
+	[TestMethod]
+	public async Task When_ImageSource()
+	{
+		var container = new Grid()
+		{
+			Width = 110,
+			Height = 110,
+		};
+		var image = new Image
+		{
+			Width = 100,
+			Height = 100,
+		};
+
+		container.Children.Add(image);
+
+		WindowHelper.WindowContent = image;
+
+		await WindowHelper.WaitForLoaded(image);
+
+		await WindowHelper.WaitForIdle();
+
+		bool opened = false;
+		var uri = new Uri("https://images.google.com/images/branding/googleg/1x/googleg_standard_color_128dp.png");
+		var bitmapImage = new Microsoft.UI.Xaml.Media.Imaging.BitmapImage(uri);
+		image.ImageOpened += (s, e) => opened = true;
+		image.Source = bitmapImage;
+
+		await WindowHelper.WaitFor(() => opened);
+
+		opened = false;
+		bitmapImage = new Microsoft.UI.Xaml.Media.Imaging.BitmapImage(uri);
+		image.Source = bitmapImage;
+
+		await WindowHelper.WaitFor(() => opened);
+
+		// This method should successfully run and not crash.
+	}
+}