Why does FixAntenna not add Tag 60 to New Order Single?

Question

Why does FixAntenna not add Tag-60 (TransactionTime) automatically when I send a NewOrder Single (D) fix message?

I can't think that this tag needs to be added "manually". ?

I am using Epam.FixAntenna.NetCore nuget package version 1.1.0

    FixMessage messageContent = new FixMessage();

    messageContent.AddTag(1, "LCE2");
    messageContent.AddTag(11, timestamp);
    messageContent.AddTag(15, "USD");
    messageContent.AddTag(21, 1);
    messageContent.AddTag(22, 8);
    messageContent.AddTag(38, msg.Qty);
    messageContent.AddTag(40, 2);
    messageContent.AddTag(44, msg.Price.ToString());
    messageContent.AddTag(48, msg.Symbol);
    messageContent.AddTag(54, msg.Side);
    messageContent.AddTag(55, msg.Symbol);
    messageContent.AddTag(59, msg.TimeInForce);
    messageContent.AddTag(128, "SAS");
        

    _orderSession.SendMessage("D", messageContent);