Address the feedback

src/libraries/Microsoft.Extensions.DependencyInjection/src/ServiceLookup/ServiceProviderEngineScope.cs

@@ -189,8 +189,11 @@ static async ValueTask Await(int i, ValueTask vt, List<object> toDispose)
 
             }
 
-            if (IsRootScope)
+            if (IsRootScope && !RootProvider.IsDisposed())
             {
+                // If this ServiceProviderEngineScope instance is a root scope, disposing this instance will need to dispose the RootProvider too.
+                // Otherwise the RootProvider will never get disposed and will leak.
+                // Note, if the RootProvider get disposed first, it will automatically dispose all attached ServiceProviderEngineScope objects.
                 RootProvider.Dispose();
             }
 

src/libraries/Microsoft.Extensions.DependencyInjection/src/ServiceProvider.cs

@@ -89,6 +89,8 @@ internal ServiceProvider(ICollection<ServiceDescriptor> serviceDescriptors, Serv
         /// <returns>The service that was produced.</returns>
         public object? GetService(Type serviceType) => GetService(serviceType, Root);
 
+        internal bool IsDisposed() => _disposed;
+
         /// <inheritdoc />
         public void Dispose()
         {

src/libraries/Microsoft.Extensions.DependencyInjection/tests/DI.Tests/ServiceProviderEngineScopeTests.cs

@@ -20,7 +20,7 @@ public void DoubleDisposeWorks()
         }
 
         [Fact]
-        public void RootDisposeTest()
+        public void RootEngineScopeDisposeTest()
         {
             var services = new ServiceCollection();
             ServiceProvider sp = services.BuildServiceProvider();