Avoid directly utilizing the disconnect method for GameClient.

L2J_Mobius_Classic_2.9_SecretOfEmpire/java/org/l2jmobius/gameserver/network/GameClient.java

@@ -97,11 +97,12 @@ public class GameClient extends NetClient
 			Disconnection.of(this).onDisconnection();
 		}
 		_connectionState = ConnectionState.DISCONNECTED;
+		super.onDisconnection();
 	}
 	
 	public void closeNow()
 	{
-		disconnect();
+		onDisconnection();
 	}
 	
 	public void close(ServerPacket packet)

L2J_Mobius_Classic_2.9_SecretOfEmpire/java/org/l2jmobius/gameserver/network/PacketHandler.java

@@ -43,7 +43,7 @@ public class PacketHandler implements PacketHandlerInterface<GameClient>
 		{
 			LOGGER.warning("PacketHandler: Problem receiving packet id from " + client);
 			LOGGER.warning(CommonUtil.getStackTrace(e));
-			client.disconnect();
+			client.closeNow();
 			return;
 		}