Fixed entity IDs getting messed up and causing desync because of purchased items in multiplayer campaign. The server created cargo items first and then mission-related entities, while the clients only spawned mission entities and relied on the server to spawn the cargo, which caused mission entities to have wrong IDs. Closes #484

Barotrauma/BarotraumaShared/Source/GameSession/GameSession.cs

@@ -226,7 +226,14 @@ namespace Barotrauma
 
             EventManager.StartRound(level);
 
-            if (GameMode != null) GameMode.MsgBox();
+            if (GameMode != null)
+            {
+                GameMode.MsgBox();
+                if (GameMode is MultiPlayerCampaign campaign && GameMain.Server != null)
+                {
+                    campaign.CargoManager.CreateItems();
+                }
+            }
 
             if (GameSettings.SendUserStatistics)
             {
@@ -234,7 +241,7 @@ namespace Barotrauma
                 GameAnalyticsSDK.Net.GameAnalytics.AddProgressionEvent(GameAnalyticsSDK.Net.EGAProgressionStatus.Start,
                     GameMode.Name, (Mission == null ? "None" : Mission.GetType().ToString()));
             }
-
+            
 #if CLIENT
             roundSummary = new RoundSummary(this);