Text missing on export time headers.

When exporting, the text from the time headers disappears. My code on the export is below, with screenshot and export attached as files.

        function exportFile() {
            var exportAs = $('input[name="radioExportAs"]:checked').val();
            var exportArea = $('input[name="radioExport"]:checked').val();

            switch (exportAs) {
                case 'png':
                    exportPNG(exportArea)
                case 'pdf':
                    exportPDF(exportArea)
            }
        }

        function exportPNG(exportArea) {
            dps.exportAs("png", { area: exportArea }).download();
        }

        function exportPDF(exportArea) {

            let options = [{ year: 'numeric' }, { month: 'numeric' }, { day: 'numeric' }];
            let joined = join(new Date, options, '-');

            var doc = new jsPDF("landscape", "mm", "a3");
            doc.setFont('Verdana','normal','normal')
            doc.setFontSize(20);
            doc.text(5, 10, "KHM Ops Scheduler");

            var image = dps.exportAs("jpeg", {
                area: exportArea,
                scale: 2,
                quality: 0.95
            });
            var dimensions = image.dimensions();
            var ratio = dimensions.width / dimensions.height;
            var width = 410;
            var height = width / ratio;
            doc.addImage(image.toDataUri(), 'JPEG', 5, 15, width, height);

            DayPilot.Util.downloadBlob(doc.output("blob"), joined + "-KHMOPS_scheduler_export.pdf");
        }