different line height from input textbox / dropdown

Hi, we got mdb PRO with version 4.5.1 and work on .Net Entity Framework MVC 5. We got some layout issues working with mdbootstrap. this will be rendered in a div: container-fluid. we always add divs as example : <div class="row"> <div class="col"> <div class="md-form"> @Html.TextBoxFor(model => model.Field.Name, new { @class = "form-control"}) </div> <div class="md-form"> @Html.DropDownListFor(model => model.DisciplineID, Model.DisciplineSelectListItems, " ", new { @class = "mdb-select" }) @Html.LabelFor(model => model.DisciplineSelectListItems) @Html.ValidationMessageFor(model => model.DisciplineID) </div> </div> </div></div>

the dropdown is shown fine, but the textbox is half heigth... 

here is our bundleConfig...

bundles.Add(new ScriptBundle("~/bundles/jquery").Include( "~/Scripts/jquery-3.2.1.min.js", "~/Scripts/popper.min.js")); bundles.Add(new ScriptBundle("~/bundles/jqueryval").Include( "~/Scripts/jquery.validate.min.js", "~/Scripts/jquery.validate.unobtrusive.js", "~/Scripts/requiredIfValidator.js", "~/Scripts/numberValidation.js", "~/Scripts/moment.min.js" )); // Use the development version of Modernizr to develop with and learn from. Then, when you're // ready for production, use the build tool at http://modernizr.com to pick only the tests you need. bundles.Add(new ScriptBundle("~/bundles/modernizr").Include( "~/Scripts/modernizr-*")); bundles.Add(new ScriptBundle("~/bundles/bootstrap").Include( "~/Scripts/bootstrap.min.js", "~/Scripts/DataTables/jquery.dataTables.min.js", "~/Scripts/DataTables/dataTables.buttons.min.js", "~/Scripts/DataTables/dataTables.bootstrap4.min.js", "~/Scripts/respond.min.js", "~/Scripts/mdb.min.js", "~/Scripts/MDB_Initialization.js", "~/Scripts/daterangepicker.js", "~/Scripts/jquery.unobtrusive-ajax.min.js" )); bundles.Add(new StyleBundle("~/bundles/css").Include( "~/Content/css/bootstrap.min.css", "~/Content/DataTables/css/dataTables.bootstrap4.min.css", "~/Content/css/mdb.min.css", "~/Content/css/daterangepicker.css", "~/Content/css/Site.css")); Thank you in advance

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