ReadBlittable / WriteBlittable for better performance.OnStopServer and OnStopClient overrides.SyncVars now support using types that inherit from NetworkBehaviour.SimpleWebTransport now has option for TLS outside the transport.MultipleMatches example featuring Network Match Checker with Lobby and Match functionality.StartServer / StartClient more than once is now prevented..PlayerScore in MultipleAdditiveScenes example.MultipleAdditiveScenes example.Mathematics.NetworkServer.maxConnections is now public.ReadyStatusChanged in NetworkRoomManager is now public.NetworkTransform now correctly uses ArraySegment in Commands.OnStopServer to NetworkSceneChecker and NetworkMatchChecker.NetworkReader.Channels.DefaultUnreliable and applies compression to rotations.NetworkMessage to use structs in all cases - classes no longer supported.ReadPacked / WritePacked functions - Use Read and Write variants instead.[Server]/[Client] can now be used outside of NetworkBehaviour.isServer will now keep its value after calling NetworkServer.Destroy.[Client] error message now correctly logs the name of the method.[Server]/[Client] now correctly give error when used on abstract method.#if UNITY_SERVER instead.undefined.ignoreAuthority option for invoking Commands on objects the client doesn't have authority over, and Command methods can have an optional NetworkConnectionToClient sender parameter.excludeOwner option to prevent messages from going to the client that owns the object.AddRange, InsertRange, and RemoveAll.OnRoomServerPlayersNotReady that fires on server from CheckReadyToBegin.OnStartClient.OnClientEnterRoom now correctly only fires on clients.RegisterClientMessages was being incorrectly invoked for every scene change.SyncMode and SyncInterval was not showing in the inspector in some cases (regression).StopClient.lastMessageTime wasn't being properly initialized, causing incorrect idle timeout disconnects.OnStopServer and OnStopClient virtual methods.ReplaceHandler methods to avoid warnings when attempting to double register message handlers.NetworkServer.SendToAll now has an optional bool to only send to ready clients, and a SendToReady method that doesn't require a Network Identity.RegisterClientMessages is no longer invoked twice on the client.SyncMode and SyncInterval was not showing in the inspector in some cases.LateUpdate now processes a limited amount of messages per tick to avoid deadlocks.OnNetworkDestroy was renamed to OnStopClient.NetworkServer.RemovePlayerForConnection instead.OnRebuildObservers, OnCheckObserver, and OnSetHostVisibility were moved to a separate class called NetworkVisibility.OnRoomStopServer added to Network Room Manager and Script Template.NetworkServer.SendToObservers now reports correct channel to Mirror Profiler.roomPlayerPrefab is now protected so it can be accessed in derived classes.NetworkServer.Destroy.NetworkServer.SendToReady overloads are no longer ambiguous.StopHost correctly raises OnServerDisconnect in Network Manager, and correctly unwinds before shutting down the server.isServer is no longer incorrectly false on server in Network Identity's OnDestroy.offlineScene and onlineScene store full paths now, so use SceneManager.GetActiveScene().path instead.StopHost / StopServer / StopClient more appropriately.OnEnable proved to be unreliable in some cases.PooledNetworkReader and PooledNetworkWriter, both Disposable.NetworkReader.ReadMessage.isClient now returns true on clients in OnDestroy for networked objects.NetworkReaderPool has been implemented in place of new NetworkReader everywhere, significantly reducing garbage allocation.hasAuthority for client owned objects.OnRoomServerAddPlayer.NetworkWriterPool is now used everywhere instead of new NetworkWriter (we missed a couple when the pool was implemented).RequestScriptReload was moved to EditorUtility from UnityEditorInternal.InternalEditorUtility.NetworkIdentity.GetSceneIdenity method renamed to GetSceneIdentity (name typo).Transport.activeTransport.Shutdown() is no longer called from Network Manager.