fix: host NetworkManager.LocalClient not being set (#1511)

* fix

Fixes the issue with the host not having a NetworkManager.LocalClient assigned after starting.

* test

The test to validate the fix

* updated changelog

Author: NoelStephensUnity

com.unity.netcode.gameobjects/CHANGELOG.md

@@ -35,6 +35,7 @@ Additional documentation and release notes are available at [Multiplayer Documen
 - Fixed: Fixed error when serializing ConnectionApprovalMessage with scene management disabled when one or more objects is hidden via the CheckObjectVisibility delegate (#1509)
 - Fixed KeyNotFound exception when removing ownership of a newly spawned NetworkObject that is already owned by the server. (#1500)
 - Fixed issue where pooled NetworkObjects using NetworkTransform would interpolate from their last de-spawned position to the newly spawned position (#1505)
+- Fixed NetworkManager.LocalClient not being set when starting as a host. (#1511)
 
 ### Changed
 

com.unity.netcode.gameobjects/Runtime/Core/NetworkManager.cs

@@ -1673,6 +1673,7 @@ internal void HandleApproval(ulong ownerClientId, bool createPlayerObject, uint?
                 }
                 else // Server just adds itself as an observer to all spawned NetworkObjects
                 {
+                    LocalClient = client;
                     SpawnManager.UpdateObservedNetworkObjects(ownerClientId);
                     InvokeOnClientConnectedCallback(ownerClientId);
                 }

testproject/Assets/Tests/Runtime/NetworkManagerTests.cs

@@ -0,0 +1,16 @@
+using NUnit.Framework;
+using Unity.Netcode.RuntimeTests;
+
+namespace TestProject.RuntimeTests
+{
+    public class NetworkManagerTests : BaseMultiInstanceTest
+    {
+        protected override int NbClients => 1;
+
+        [Test]
+        public void ValidateHostLocalClient()
+        {
+            Assert.IsTrue(m_ServerNetworkManager.LocalClient != null);
+        }
+    }
+}