diff --git a/Microsoft.Toolkit.Uwp.UI.Animations/Extensions/StoryboardAnimations.cs b/Microsoft.Toolkit.Uwp.UI.Animations/Extensions/StoryboardAnimations.cs
index 0a67e640ead..7b60d07b266 100644
--- a/Microsoft.Toolkit.Uwp.UI.Animations/Extensions/StoryboardAnimations.cs
+++ b/Microsoft.Toolkit.Uwp.UI.Animations/Extensions/StoryboardAnimations.cs
@@ -23,7 +23,14 @@ public static Task BeginAsync(this Storyboard storyboard)
         {
             TaskCompletionSource<object?> taskCompletionSource = new TaskCompletionSource<object?>();
 
-            storyboard.Completed += (_, _) => taskCompletionSource.SetResult(null);
+            void OnCompleted(object sender, object e)
+            {
+                ((Storyboard)sender).Completed -= OnCompleted;
+
+                taskCompletionSource.SetResult(null);
+            }
+
+            storyboard.Completed += OnCompleted;
 
             storyboard.Begin();