Core/Objects: Fixes object not being updated in ObjectAccessor

Source/Game/Globals/ObjectAccessor.cs

@@ -25,6 +25,11 @@ using System.Collections.Generic;
 
 public class ObjectAccessor : Singleton<ObjectAccessor>
 {
+    object _lockObject = new object();
+
+    Dictionary<ObjectGuid, Player> _players = new Dictionary<ObjectGuid, Player>();
+    Dictionary<ObjectGuid, Transport> _transports = new Dictionary<ObjectGuid, Transport>();
+
     ObjectAccessor() { }
 
     public WorldObject GetWorldObject(WorldObject p, ObjectGuid guid)
@@ -200,6 +205,7 @@ public class ObjectAccessor : Singleton<ObjectAccessor>
     // this returns Player even if he is not in world, for example teleporting
     public Player FindConnectedPlayer(ObjectGuid guid)
     {
+        lock (_lockObject)
             return _players.LookupByKey(guid);
     }
     public Player FindConnectedPlayerByName(string name)
@@ -209,44 +215,52 @@ public class ObjectAccessor : Singleton<ObjectAccessor>
 
     public Transport FindTransport(ObjectGuid guid)
     {
+        lock (_lockObject)
             return _transports.LookupByKey(guid);
     }
 
     public void SaveAllPlayers()
+    {
+        lock (_lockObject)
         {
             foreach (var pl in GetPlayers())
                 pl.SaveToDB();
         }
+    }
 
     public ICollection<Player> GetPlayers()
     {
+        lock (_lockObject)
             return _players.Values;
     }
 
     public void AddObject(Player obj)
+    {
+        lock (_lockObject)
         {
             PlayerNameMapHolder.Insert(obj);
-        _players.TryAdd(obj.GetGUID(), obj);
+            _players[obj.GetGUID()] = obj;
+        }
     }
     public void AddObject(Transport obj)
     {
-        _transports.TryAdd(obj.GetGUID(), obj);
+        lock (_lockObject)
+            _transports[obj.GetGUID()] = obj;
     }
 
     public void RemoveObject(Player obj)
     {
-        Player player;
+        lock (_lockObject)
+        {
             PlayerNameMapHolder.Remove(obj);
-        _players.TryRemove(obj.GetGUID(), out player);
+            _players.Remove(obj.GetGUID());
+        }
     }
     public void RemoveObject(Transport obj)
     {
-        Transport transport;
+        lock (_lockObject)
-        _transports.TryRemove(obj.GetGUID(), out transport);
+            _transports.Remove(obj.GetGUID());
     }
-
-    ConcurrentDictionary<ObjectGuid, Player> _players = new ConcurrentDictionary<ObjectGuid, Player>();
-    ConcurrentDictionary<ObjectGuid, Transport> _transports = new ConcurrentDictionary<ObjectGuid, Transport>();
 }
 
 class PlayerNameMapHolder