ajax done fire before server response

I have a problem, when I use ajax post data into my express(nodejs) server, before server side response, the ajax .done still fire. So, I do a testing, to remove server side response, I found ajax still fire .done.

Server: Express(Node.js) Client: JQuery(3.2.1) post by ajax

ajax code:

    $('#createNewGroup').click(function() {
        $('#loading').show();

        $.ajax({
           url: 'list_live_createNewGroup',
           type: 'POST',
           cache: false,
           data: {  groupname: $('#groupname').val(),
                    groupdesc: $('#groupdesc').val(),
                    grouplocation: $('#grouplocation').val(),
                    accountname: $('#accountname').val(),
                    accountid: $('#accountid').val(),
                    bankname:  $('#bankname').val() }})
        .done(function(data) {

            $('#loading').hide();

            window.location.hash = '#mygroups';
            window.location.reload(true);
        })
        .always(function(data) {

        })
        .fail(function(data) {
            $('#loading').hide();

            var response = JSON.parse(data["responseText"]);
            alert(response["msg"]);

            window.location.href = "list#creategroup";

        });
    });

server side code:

router.post('/list_live_createNewGroup', tools.checkUserLogin, function(request, response) {
    var currentUser = new Parse.User();
    currentUser.id = request.session.user;

    // response.json(true);


});

via 章恩齊