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Unexpected behavior calling PdfCode128Barcode.Draw for the second time onwards with respect to bar height

From the second call to PdfCode128Barcode.Draw onwards, the bar height of the barcode is (re)set to the initial bar height + 3.752. As the first barcode is drawn with bar height 80 and not 83.752 and as this doesn't happen when you use PdfCode128XBarcode.Draw where X in {A, B, C}, I assume this is a bug.

        static void ShowPdf128BarcodeBarHeightBug()

        {

            PdfDocument document = new PdfDocument();

            // setting margin to 0 and drawing barcode at (0, 0)

            // so it's easy to read the size using the ruler

            // in Adobe Acrobat Reader DC

            document.PageSettings.SetMargins(0f);

            PdfUnidimensionalBarcode barcode = new PdfCode128Barcode("1234567890");

            // light gray background to see the barcode size

            barcode.BackColor = new PdfColor(Color.WhiteSmoke);

            barcode.BarHeight = 80f;

            Console.WriteLine($"before {barcode.BarHeight}"); // 80

            PdfPage page = document.Pages.Add();


            barcode.Draw(page); // bar height in the document is correctly 80

            Console.WriteLine($"after {barcode.BarHeight}"); // 80

            foreach (int index in Enumerable.Range(1, 9))

            {

                barcode.BarHeight = 80f+(float)index;

                Console.WriteLine($"before {barcode.BarHeight}"); // 80+index

                PdfPage _page = document.Pages.Add();


                barcode.Draw(_page); // bar height in the document is 83.65

                Console.WriteLine($"after {barcode.BarHeight}"); // 83.752 but should be 80+index

            }

            document.Save($"{System.Reflection.MethodBase.GetCurrentMethod().Name}.pdf");

            document.Close();

        }