chore: merge v2.4.3 back into develop-2.0.0 (#3523)

Chore to merge the hot-fix patch v2.4.3 back into the develop-2.0.0
branch.


## Changelog

NA

## Testing and Documentation

- No tests have been added.
- No documentation changes or additions were necessary.

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- [ ] Deprecation of the API is explained in the CHANGELOG.
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## Backport

This is a v2.x specific PR.

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---------

Co-authored-by: unity-renovate[bot] <120015202+unity-renovate[bot]@users.noreply.github.com>
Co-authored-by: Emma <[email protected]>

Author: 3 people

com.unity.netcode.gameobjects/CHANGELOG.md

@@ -20,6 +20,13 @@ Additional documentation and release notes are available at [Multiplayer Documen
 ### Changed
 
 
+## [2.4.3] - 2025-06-25
+
+### Fixed
+
+- Fixed issue where spawned objects with `NetworkObject.DontDestroyWithOwner` set to `false` would not be destroyed when using a client-server network topology. (#3522)
+
+
 ## [2.4.2] - 2025-06-13
 
 ### Fixed

com.unity.netcode.gameobjects/Runtime/Connection/NetworkConnectionManager.cs

@@ -1177,8 +1177,7 @@ internal void OnClientDisconnectFromServer(ulong clientId)
                     if (ownedObject)
                     {
                         // If destroying with owner, then always despawn and destroy (or defer destroying to prefab handler)
-                        // Handle an object with no observers other than the current disconnecting client as destroying with owner
-                        if (!ownedObject.DontDestroyWithOwner && (ownedObject.Observers.Count == 0 || (ownedObject.Observers.Count == 1 && ownedObject.Observers.Contains(clientId))))
+                        if (!ownedObject.DontDestroyWithOwner)
                         {
                             if (NetworkManager.PrefabHandler.ContainsHandler(ownedObject.GlobalObjectIdHash))
                             {
@@ -1244,7 +1243,7 @@ internal void OnClientDisconnectFromServer(ulong clientId)
                                     }
 
                                     // Skip destroy with owner objects as they will be processed by the outer loop
-                                    if (!childObject.DontDestroyWithOwner && (childObject.Observers.Count == 0 || (childObject.Observers.Count == 1 && childObject.Observers.Contains(clientId))))
+                                    if (!childObject.DontDestroyWithOwner)
                                     {
                                         continue;
                                     }