Update CHANGELOG

Author: EmandM

com.unity.netcode.gameobjects/CHANGELOG.md

@@ -22,6 +22,7 @@ Additional documentation and release notes are available at [Multiplayer Documen
 
 ### Fixed
 
+- Ensure `NetworkBehaviour.IsSessionOwner` is correctly set when a new session owner is promoted. (#3817)
 
 ### Security
 

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

@@ -1685,15 +1685,12 @@ public virtual void OnDestroy()
                 Debug.LogException(ex);
             }
 
-            if (IsSpawned)
+            if (m_NetworkObject != null && m_NetworkObject.IsSpawned && IsSpawned)
             {
-                if (m_NetworkObject != null && m_NetworkObject.IsSpawned)
-                {
-                    // If the associated NetworkObject is still spawned then this
-                    // NetworkBehaviour will be removed from the NetworkObject's
-                    // ChildNetworkBehaviours list.
-                    m_NetworkObject.OnNetworkBehaviourDestroyed(this);
-                }
+                // If the associated NetworkObject is still spawned then this
+                // NetworkBehaviour will be removed from the NetworkObject's
+                // ChildNetworkBehaviours list.
+                m_NetworkObject.OnNetworkBehaviourDestroyed(this);
             }
 
             // this seems odd to do here, but in fact especially in tests we can find ourselves