Hello,
sometimes when I try to Upload files via the upload-control the upload ends up in 103% without the save and onsuccess-events firing. It doesn't seem to have anything to do with the file itself, as I'm always using the same. Sometimes it works, sometimes it doesn't.
function onSuccess(e) {    var gridNotification = $("#gridNotification").data("kendoNotification");    var crmType = $("#ddlCrmType").data("kendoDropDownList");    var csvHeadRow = e.response.csvHeadRow    var url = '@Url.Action(MVC.Mapping.ReturnMappingGrid())';    $.ajax({        type: "POST",        url: url,        data: JSON.stringify({ csvHead: csvHeadRow, crmType: crmType.text() }),        contentType: "application/json; charset=utf-8",        dataType: "json",        success: function (data) {            $('#gridContainer').html(data);            gridNotification.show("Die Auswahl der jeweiligen Eigenschaft erfolgt durch Klicken des jeweiligen Eigenschaft-Felds!")            var container = $(gridNotification.options.appendTo);        },        error: function (xmlHttpRequest, textStatus, errorThrown) {            debugger;            console.log(xmlHttpRequest.responseText);            console.log(textStatus);            console.log(errorThrown);        },        async: false    });}
@(Html.Kendo().Upload()    .Name("upMappingFile")    .Multiple(false)    .ShowFileList(true)    .TemplateId("fuCsvTemplate")    .Async(a => a        .AutoUpload(true)        .Save("SaveFile", "Mapping")        .Remove("RemoveFile", "Mapping")    )    .Enable(false)    .Events(e => e        .Success("onSuccess"))    .Messages(m => m        .Select("Durchsuchen...")        .HeaderStatusUploading("Uploading...")        .HeaderStatusUploaded("Fertig")))