Unity-Technologies · noellie-velez · Apr 24, 2026 · Apr 24, 2026 · Apr 24, 2026 · Apr 24, 2026
@@ -706,7 +706,6 @@ protected virtual bool OnIsServerAuthoritative()
         private int[] m_TransitionHash;
         private int[] m_AnimationHash;
         private float[] m_LayerWeights;
-        private static byte[] s_EmptyArray = new byte[] { };
         private List<int> m_ParametersToUpdate;
         private RpcParams m_RpcParams;
         private IGroupRpcTarget m_TargetGroup;

@@ -2221,13 +2221,11 @@ private bool CheckForStateChange(ref NetworkTransformState networkState, bool is
                 // values are applied.
                 var hasParentNetworkObject = false;
 
-                var parentNetworkObject = (NetworkObject)null;
-
                 // If the NetworkObject belonging to this NetworkTransform instance has a parent
                 // (i.e. this handles nested NetworkTransforms under a parent at some layer above)
                 if (NetworkObject.transform.parent != null)
                 {
-                    parentNetworkObject = NetworkObject.transform.parent.GetComponent<NetworkObject>();
+                    var parentNetworkObject = NetworkObject.transform.parent.GetComponent<NetworkObject>();
 
                     // In-scene placed NetworkObjects parented under a GameObject with no
                     // NetworkObject preserve their lossyScale when synchronizing.
@@ -4800,6 +4798,21 @@ public NetworkTransformTickRegistration(NetworkManager networkManager)
             }
         }
         private static int s_TickSynchPosition;
+
+#if UNITY_EDITOR
+        [RuntimeInitializeOnLoadMethod(RuntimeInitializeLoadType.SubsystemRegistration)]
+        private static void ResetStaticsOnLoad()
+        {
+            CurrentTick = 0;
+            TrackStateUpdateId = false;
+            AssignDefaultInterpolationType = false;
+            DefaultInterpolationType = default;
+            s_NetworkTickRegistration = new Dictionary<NetworkManager, NetworkTransformTickRegistration>();
+            InterpolationBufferTickOffset = 0;
+            s_TickSynchPosition = 0;
+        }
+#endif
+
         private int m_NextTickSync;
 
         internal void RegisterForTickSynchronization()

@@ -44,6 +44,10 @@ public static class QuaternionCompressor
 
         // Used to store the absolute value of the 4 quaternion elements
         private static Quaternion s_QuatAbsValues = Quaternion.identity;
+#if UNITY_EDITOR
+        [RuntimeInitializeOnLoadMethod(RuntimeInitializeLoadType.SubsystemRegistration)]
+        private static void ResetStaticsOnLoad() => s_QuatAbsValues = Quaternion.identity;
+#endif
 
         /// <summary>
         /// Compresses a Quaternion into an unsigned integer

@@ -20,7 +20,7 @@ public struct ContactEventHandlerInfo
         /// </summary>
         public bool ProvideNonRigidBodyContactEvents;
         /// <summary>
-        /// When set to true, the <see cref="RigidbodyContactEventManager"/> will prioritize invoking <see cref="IContactEventHandler.ContactEvent(ulong, Vector3, Rigidbody, Vector3, bool, Vector3)"/> <br /></br>
+        /// When set to true, the <see cref="RigidbodyContactEventManager"/> will prioritize invoking <see cref="IContactEventHandler.ContactEvent(ulong, Vector3, Rigidbody, Vector3, bool, Vector3)"/> <br />
         /// if it is the 2nd colliding body in the contact pair being processed. With distributed authority, setting this value to true when a <see cref="NetworkObject"/> is owned by the local client <br />
         /// will assure <see cref="IContactEventHandler.ContactEvent(ulong, Vector3, Rigidbody, Vector3, bool, Vector3)"/> is only invoked on the authoritative side.
         /// </summary>
@@ -76,6 +76,10 @@ public interface IContactEventHandlerWithInfo : IContactEventHandler
     public class RigidbodyContactEventManager : MonoBehaviour
     {
         public static RigidbodyContactEventManager Instance { get; private set; }
+#if UNITY_EDITOR
+        [RuntimeInitializeOnLoadMethod(RuntimeInitializeLoadType.SubsystemRegistration)]
+        private static void ResetStaticsOnLoad() => Instance = null;
+#endif
 
         private struct JobResultStruct
         {

@@ -30,32 +30,32 @@ private set
         }
         private static CommandLineOptions s_Instance;
 
-        [RuntimeInitializeOnLoadMethod(RuntimeInitializeLoadType.SubsystemRegistration)]
-        private static void RuntimeInitializeOnLoad() => Instance = new CommandLineOptions();
-
         // Contains the current application instance domain's command line arguments
-        internal static List<string> CommandLineArguments = new List<string>();
+        private static List<string> s_CommandLineArguments = new List<string>(Environment.GetCommandLineArgs());
 
-        // Invoked upon application start, after scene load
-        [RuntimeInitializeOnLoadMethod]
-        private static void ParseCommandLineArguments()
+#if UNITY_EDITOR
+        [RuntimeInitializeOnLoadMethod(RuntimeInitializeLoadType.SubsystemRegistration)]
+        private static void ResetStaticsOnLoad()
         {
+            Instance = new CommandLineOptions();
+            s_Instance = new CommandLineOptions();
             // Get all the command line arguments to be parsed later and/or modified
             // prior to being parsed (for testing purposes).
-            CommandLineArguments = new List<string>(Environment.GetCommandLineArgs());
+            s_CommandLineArguments = new List<string>(Environment.GetCommandLineArgs());
         }
+#endif
 
         /// <summary>
-        /// Returns the value of an argument or null if there the argument is not present
+        /// Returns the value of an argument or null if the argument is not present
         /// </summary>
         /// <param name="arg">The name of the argument</param>
         /// <returns><see cref="string"/>Value of the command line argument passed in.</returns>
         public string GetArg(string arg)
         {
-            var argIndex = CommandLineArguments.IndexOf(arg);
-            if (argIndex >= 0 && argIndex < CommandLineArguments.Count - 1)
+            var argIndex = s_CommandLineArguments.IndexOf(arg);
+            if (argIndex >= 0 && argIndex < s_CommandLineArguments.Count - 1)
             {
-                return CommandLineArguments[argIndex + 1];
+                return s_CommandLineArguments[argIndex + 1];
             }
             return null;
         }

@@ -1,5 +1,8 @@
 using System;
 using System.Collections.Generic;
+#if UNITY_EDITOR
+using UnityEngine;
+#endif
 
 namespace Unity.Netcode
 {
@@ -14,6 +17,10 @@ internal static class ComponentFactory
         internal delegate object CreateObjectDelegate(NetworkManager networkManager);
 
         private static Dictionary<Type, CreateObjectDelegate> s_Delegates = new Dictionary<Type, CreateObjectDelegate>();
+#if UNITY_EDITOR
+        [RuntimeInitializeOnLoadMethod(RuntimeInitializeLoadType.SubsystemRegistration)]
+        private static void ResetStaticsOnLoad() => s_Delegates = new Dictionary<Type, CreateObjectDelegate>();
+#endif
 
         /// <summary>
         /// Instantiates an instance of a given interface

@@ -1333,8 +1333,6 @@ internal void NetworkVariableUpdate(ulong targetClientId, bool forceSend = false
             }
         }
 
-        internal static bool LogSentVariableUpdateMessage;
-
         private bool CouldHaveDirtyNetworkVariables()
         {
             // TODO: There should be a better way by reading one dirty variable vs. 'n'

@@ -1809,6 +1809,19 @@ internal abstract class NetcodeAnalytics
         internal delegate void ResetNetworkManagerDelegate(NetworkManager manager);
 
         internal static ResetNetworkManagerDelegate OnNetworkManagerReset;
+        //We already are in an #if UNITY_ENGINE def
+        [RuntimeInitializeOnLoadMethod(RuntimeInitializeLoadType.SubsystemRegistration)]
+        private static void ResetStaticsOnLoad()
+        {
+            Singleton = null;
+            OnInstantiated = null;
+            OnDestroying = null;
+            OnSingletonReady = null;
+            OnNetworkManagerReset = null;
+            IsDistributedAuthority = false;
+            s_SerializedType = new List<Type>();
+            DisableNotOptimizedSerializedType = false;
+        }
 
         private void Reset()
         {

@@ -1729,6 +1729,11 @@ internal void SetIsDestroying()
             IsDestroying = true;
         }
 
+        private void OnDisable()
+        {
+            SceneManager.activeSceneChanged -= CurrentlyActiveSceneChanged;
+        }
+
         private void OnDestroy()
         {
             // Apply the is destroying flag
@@ -2506,6 +2511,10 @@ private void OnTransformParentChanged()
         // If you couldn't find your parent, we put you into OrphanChildren set and every time we spawn another NetworkObject locally due to replication,
         // we call CheckOrphanChildren() method and quickly iterate over OrphanChildren set and see if we can reparent/adopt one.
         internal static HashSet<NetworkObject> OrphanChildren = new HashSet<NetworkObject>();
+#if UNITY_EDITOR
+        [RuntimeInitializeOnLoadMethod(RuntimeInitializeLoadType.SubsystemRegistration)]
+        private static void ResetStaticsOnLoad() => OrphanChildren = new HashSet<NetworkObject>();
+#endif
 
         internal bool ApplyNetworkParenting(bool removeParent = false, bool ignoreNotSpawned = false, bool orphanedChildPass = false, bool enableNotification = true)
         {

@@ -291,6 +291,16 @@ public static PlayerLoopSystem CreateLoopSystem()
         [RuntimeInitializeOnLoadMethod(RuntimeInitializeLoadType.SubsystemRegistration)]
         private static void Initialize()
         {
+#if UNITY_EDITOR
+            s_UpdateSystem_Sets = new Dictionary<NetworkUpdateStage, HashSet<INetworkUpdateSystem>>();
+            s_UpdateSystem_Arrays = new Dictionary<NetworkUpdateStage, INetworkUpdateSystem[]>();
+            foreach (NetworkUpdateStage updateStage in Enum.GetValues(typeof(NetworkUpdateStage)))
+            {
+                s_UpdateSystem_Sets.Add(updateStage, new HashSet<INetworkUpdateSystem>());
+                s_UpdateSystem_Arrays.Add(updateStage, new INetworkUpdateSystem[k_UpdateSystem_InitialArrayCapacity]);
+            }
+            UpdateStage = default;
+#endif
             UnregisterLoopSystems();
             RegisterLoopSystems();
         }

@@ -58,6 +58,10 @@ public static class NetworkLog
         public static void LogErrorServer(string message) => LogServer(message, LogType.Error);
 
         internal static NetworkManager NetworkManagerOverride;
+#if UNITY_EDITOR
+        [RuntimeInitializeOnLoadMethod(RuntimeInitializeLoadType.SubsystemRegistration)]
+        private static void ResetStaticsOnLoad() => NetworkManagerOverride = null;
+#endif
 
         private static void LogServer(string message, LogType logType)
         {

@@ -1,5 +1,8 @@
 using System.Collections.Generic;
 using Unity.Collections;
+#if UNITY_EDITOR
+using UnityEngine;
+#endif
 
 namespace Unity.Netcode
 {
@@ -96,6 +99,10 @@ public virtual unsafe void CleanupStaleTriggers()
         /// Used for testing purposes
         /// </summary>
         internal static bool IncludeMessageType = true;
+#if UNITY_EDITOR
+        [RuntimeInitializeOnLoadMethod(RuntimeInitializeLoadType.SubsystemRegistration)]
+        private static void ResetStaticsOnLoad() => IncludeMessageType = true;
+#endif
 
         private string GetWarningMessage(IDeferredNetworkMessageManager.TriggerType triggerType, ulong key, TriggerInfo triggerInfo, float spawnTimeout)
         {

@@ -1,6 +1,7 @@
 using System;
 using System.Collections.Generic;
 #if UNITY_EDITOR
+using UnityEngine;
 using UnityEditor;
 #endif
 
@@ -53,6 +54,10 @@ internal struct ILPPMessageProvider : INetworkMessageProvider
 
         // Enable this for integration tests that need no message types defined
         internal static bool IntegrationTestNoMessages;
+#if UNITY_EDITOR
+        [RuntimeInitializeOnLoadMethod(RuntimeInitializeLoadType.SubsystemRegistration)]
+        private static void ResetStaticsOnLoad() => IntegrationTestNoMessages = false;
+#endif
 
         /// <summary>
         /// Returns a table of message type to NetworkMessageTypes enum value

@@ -1,4 +1,3 @@
-
 namespace Unity.Netcode
 {
     /// <summary>

@@ -1,7 +1,6 @@
 using System;
 using System.Collections.Generic;
 using Unity.Netcode;
-using UnityEditor;
 using UnityEngine;
 
 internal static class MessageDelivery
@@ -15,17 +14,21 @@ internal static class MessageDelivery
     /// when sending the message via public API.
     /// - Skip the time sync messages since it has always used unreliable network delivery.
     /// </summary>
-    private static HashSet<NetworkMessageTypes> s_SkipMessageTypes = new HashSet<NetworkMessageTypes>(){
+    private static readonly HashSet<NetworkMessageTypes> k_SkipMessageTypes = new HashSet<NetworkMessageTypes>(){
         NetworkMessageTypes.NamedMessage, NetworkMessageTypes.Unnamed};
 
-    [RuntimeInitializeOnLoadMethod]
+    [RuntimeInitializeOnLoadMethod(RuntimeInitializeLoadType.SubsystemRegistration)]
     private static void OnApplicationStart()
     {
+#if UNITY_EDITOR
+        s_MessageToDelivery = new Dictionary<NetworkMessageTypes, NetworkDelivery>();
+        s_MessageToMessageType = new Dictionary<Type, NetworkMessageTypes>();
+#endif
         UpdateMessageTypes();
     }
 
     /// <summary>
-    /// FIrst pass at providing an easier path to configuring the network
+    /// First pass at providing an easier path to configuring the network
     /// delivery type for the message type.
     /// TODO: Once <see cref="NetworkMessageManager"/> coalesces all reliable messages
     /// and/or organizes by a more unified order of operation tracking built into the
@@ -40,7 +43,7 @@ private static void UpdateMessageTypes()
         foreach (var messageTypeObject in networkMessageTypes)
         {
             var messageType = (NetworkMessageTypes)messageTypeObject;
-            if (s_SkipMessageTypes.Contains(messageType))
+            if (k_SkipMessageTypes.Contains(messageType))
             {
                 continue;
             }
@@ -71,18 +74,10 @@ private static void UpdateMessageTypes()
         MessageDeliveryType<TimeSyncMessage>.Initialize();
     }
 
-#if UNITY_EDITOR
-    [InitializeOnLoadMethod]
-    [InitializeOnEnterPlayMode]
-    private static void OnEnterPlayMode()
-    {
-        UpdateMessageTypes();
-    }
-#endif
     internal static NetworkDelivery GetDelivery(Type type)
     {
         // Return the default if not registered or null
-        if (type == null || s_SkipMessageTypes.Contains(s_MessageToMessageType[type]))
+        if (type == null || k_SkipMessageTypes.Contains(s_MessageToMessageType[type]))
         {
             return NetworkDelivery.ReliableFragmentedSequenced;
         }
@@ -91,7 +86,7 @@ internal static NetworkDelivery GetDelivery(Type type)
 
     internal static NetworkDelivery GetDelivery(NetworkMessageTypes messageType)
     {
-        if (s_SkipMessageTypes.Contains(messageType))
+        if (k_SkipMessageTypes.Contains(messageType))
         {
             throw new Exception($"{messageType} is not registered in the message type to network delivery map!");
         }

@@ -34,9 +34,9 @@ public InvalidMessageStructureException(string issue) : base(issue)
     internal class NetworkMessageManager : IDisposable
     {
         public bool StopProcessing = false;
-        private static Type s_ConnectionApprovedType = typeof(ConnectionApprovedMessage);
-        private static Type s_ConnectionRequestType = typeof(ConnectionRequestMessage);
-        private static Type s_DisconnectReasonType = typeof(DisconnectReasonMessage);
+        private static readonly Type k_ConnectionApprovedType = typeof(ConnectionApprovedMessage);
+        private static readonly Type k_ConnectionRequestType = typeof(ConnectionRequestMessage);
+        private static readonly Type k_DisconnectReasonType = typeof(DisconnectReasonMessage);
 
         private struct ReceiveQueueItem
         {
@@ -149,8 +149,6 @@ public NetworkMessageManager(INetworkMessageSender sender, object owner, INetwor
             }
         }
 
-        internal static bool EnableMessageOrderConsoleLog = false;
-
         public void Dispose()
         {
             if (m_Disposed)
@@ -549,7 +547,7 @@ internal int GetMessageVersion(Type type, ulong clientId, bool forReceive = fals
             // Special cases because these are the messages that carry the version info - thus the version info isn't
             // populated yet when we get these. The first part of these messages always has to be the version data
             // and can't change.
-            if (messageType != s_ConnectionRequestType && messageType != s_ConnectionApprovedType && messageType != s_DisconnectReasonType && context.SenderId != manager.m_LocalClientId)
+            if (messageType != k_ConnectionRequestType && messageType != k_ConnectionApprovedType && messageType != k_DisconnectReasonType && context.SenderId != manager.m_LocalClientId)
             {
                 messageVersion = manager.GetMessageVersion(messageType, context.SenderId, true);
                 if (messageVersion < 0)
@@ -603,7 +601,7 @@ internal int SendMessage<TMessageType, TClientIdListType>(ref TMessageType messa
                 var messageVersion = 0;
                 // Special case because this is the message that carries the version info - thus the version info isn't populated yet when we get this.
                 // The first part of this message always has to be the version data and can't change.
-                if (typeof(TMessageType) != s_ConnectionRequestType)
+                if (typeof(TMessageType) != k_ConnectionRequestType)
                 {
                     messageVersion = GetMessageVersion(typeof(TMessageType), clientIds[i]);
                     if (messageVersion < 0)
@@ -657,7 +655,7 @@ internal unsafe int SendPreSerializedMessage<TMessageType>(in FastBufferWriter t
 
                 // Special case because this is the message that carries the version info - thus the version info isn't populated yet when we get this.
                 // The first part of this message always has to be the version data and can't change.
-                if (typeof(TMessageType) != s_ConnectionRequestType)
+                if (typeof(TMessageType) != k_ConnectionRequestType)
                 {
                     var messageVersion = GetMessageVersion(typeof(TMessageType), clientIds[i]);
                     if (messageVersion < 0)
@@ -741,7 +739,7 @@ internal unsafe int SendPreSerializedMessage<TMessageType>(in FastBufferWriter t
             // Special case because this is the message that carries the version info - thus the version info isn't
             // populated yet when we get this. The first part of this message always has to be the version data
             // and can't change.
-            if (typeof(TMessageType) != s_ConnectionRequestType)
+            if (typeof(TMessageType) != k_ConnectionRequestType)
             {
                 messageVersion = GetMessageVersion(typeof(TMessageType), clientId);
                 if (messageVersion < 0)
-Original file line number
+Diff line change
@@ Expand Up @@
                 }
             }
-            internal static bool LogSentVariableUpdateMessage;
             private bool CouldHaveDirtyNetworkVariables()
             {
                 // TODO: There should be a better way by reading one dirty variable vs. 'n'
@@ Expand Down @@