Try Ignoring tests that regularly fail more often (though still think it's just random based on number of tests run...)

Need to comment out as Ignore ignored... see CommunityToolkit/Tooling-Windows-Submodule#121
Related to investigation, see info in actions/runner-images#7937

Author: michael-hawker

components/Extensions/tests/DispatcherQueueExtensionTests.cs

@@ -336,8 +336,9 @@ await DispatcherQueue.GetForCurrentThread().EnqueueAsync(async () =>
         Assert.IsNull(taskSource.Task.Exception);
     }
 
+    [Ignore]
     [TestCategory("DispatcherQueueExtensions")]
-    [UIThreadTestMethod]
+    ////[UIThreadTestMethod] - TODO: https://github.com/CommunityToolkit/Tooling-Windows-Submodule/issues/121
     public async Task DispatcherQueueHelper_FuncOfTaskOfT_Exception()
     {
         var task = DispatcherQueue.GetForCurrentThread().EnqueueAsync(new Func<Task<int>>(() =>

components/Extensions/tests/Element/FrameworkElementExtensionsTests.RelativeAncestor.cs

@@ -59,8 +59,9 @@ public async Task FrameworkElementExtension_RelativeAncestor_FreeParentBaseline(
         Assert.IsFalse(textRef.IsAlive, "TextBox is still alive...");
     }
 
+    [Ignore]
     [TestCategory("FrameworkElementExtension")]
-    [UIThreadTestMethod]
+    ////[UIThreadTestMethod] - TODO: https://github.com/CommunityToolkit/Tooling-Windows-Submodule/issues/121
     public async Task FrameworkElementExtension_RelativeAncestor_FreeParent(FrameworkElementRelativeAncestorDataTemplateTestPage page)
     {
         var list = page.FindDescendant<ListView>();
@@ -85,9 +86,9 @@ public async Task FrameworkElementExtension_RelativeAncestor_FreeParent(Framewor
         Assert.IsFalse(listRef.IsAlive, "ListView is still alive...");
     }
 
-    [TestCategory("FrameworkElementExtension")]
-    [UIThreadTestMethod]
     [Ignore]
+    [TestCategory("FrameworkElementExtension")]
+    ////[UIThreadTestMethod] - TODO: https://github.com/CommunityToolkit/Tooling-Windows-Submodule/issues/121
     public async Task FrameworkElementExtension_RelativeAncestor_FreePageNavigation()
     {
         TaskCompletionSource<bool?> taskCompletionSource = new();