1.5.1

[1.5.1] - 2023-05-24

Added

• Added support for serializing NativeArray<> and NativeList<> in FastBufferReader/FastBufferWriter, BufferSerializer, NetworkVariable, and RPCs. (To use NativeList<>, add UNITY_NETCODE_NATIVE_COLLECTION_SUPPORT to your Scripting Define Symbols in Project Settings > Player) (#2375)
• The location of the automatically-created default network prefab list can now be configured (#2544)
• Added: Message size limits (max single message and max fragmented message) can now be set using NetworkManager.MaximumTransmissionUnitSize and NetworkManager.MaximumFragmentedMessageSize for transports that don't work with the default values (#2530)
• Added NetworkObject.SpawnWithObservers property (default is true) that when set to false will spawn a NetworkObject with no observers and will not be spawned on any client until NetworkObject.NetworkShow is invoked. (#2568)

Fixed

• Fixed: Fixed a null reference in codegen in some projects (#2581)
• Fixed issue where the OnClientDisconnected client identifier was incorrect after a pending client connection was denied. (#2569)
• Fixed warning "Runtime Network Prefabs was not empty at initialization time." being erroneously logged when no runtime network prefabs had been added (#2565)
• Fixed issue where some temporary debug console logging was left in a merged PR. (#2562)
• Fixed the "Generate Default Network Prefabs List" setting not loading correctly and always reverting to being checked. (#2545)
• Fixed issue where users could not use NetworkSceneManager.VerifySceneBeforeLoading to exclude runtime generated scenes from client synchronization. (#2550)
• Fixed missing value on NetworkListEvent for EventType.RemoveAt events. (#2542,#2543)
• Fixed issue where parenting a NetworkTransform under a transform with a scale other than Vector3.one would result in incorrect values on non-authoritative instances. (#2538)
• Fixed issue where a server would include scene migrated and then despawned NetworkObjects to a client that was being synchronized. (#2532)
• Fixed the inspector throwing exceptions when attempting to render NetworkVariables of enum types. (#2529)
• Making a NetworkVariable with an INetworkSerializable type that doesn't meet the new() constraint will now create a compile-time error instead of an editor crash (#2528)
• Fixed Multiplayer Tools package installation docs page link on the NetworkManager popup. (#2526)
• Fixed an exception and error logging when two different objects are shown and hidden on the same frame (#2524)
• Fixed a memory leak in UnityTransport that occurred if StartClient failed. (#2518)
• Fixed issue where a client could throw an exception if abruptly disconnected from a network session with one or more spawned NetworkObject(s). (#2510)
• Fixed issue where invalid endpoint addresses were not being detected and returning false from NGO UnityTransport. (#2496)
• Fixed some errors that could occur if a connection is lost and the loss is detected when attempting to write to the socket. (#2495)

Changed

• Adding network prefabs before NetworkManager initialization is now supported. (#2565)
• Connecting clients being synchronized now switch to the server's active scene before spawning and synchronizing NetworkObjects. (#2532)
• Updated UnityTransport dependency on com.unity.transport to 1.3.4. (#2533)
• Improved performance of NetworkBehaviour initialization by replacing reflection when initializing NetworkVariables with compile-time code generation, which should help reduce hitching during additive scene loads. (#2522)