Some styles do not work for phrases containing Polish letters

[bard4]

Describe the bug

When I used polish letters and trid to apply BOLD or ITALIC style I noticed that it doesn`t work.
In the example below:

• in 1. (polish letters) I should get bolded text
• in 3. (polish letters) I should get italic text
• in 2,4 (no polish letters) styles are correctly applied
• in 5,6 (polish letters) strikethroug and underline styles are correctly applied

To Reproduce

Document document = new Document();
PdfWriter writer = PdfWriter.getInstance(document, new FileOutputStream("c:/pdf/pdf-document.pdf"));
document.open();
PdfPTable datatable = new PdfPTable(2);
datatable.addCell(new Phrase("1. aącćeęlł BOLD", new Font(Font.HELVETICA, 20, Font.BOLD)));
datatable.addCell(new Phrase("2. aacceell BOLD", new Font(Font.HELVETICA, 20, Font.BOLD)));
datatable.addCell(new Phrase("3. aącćeęlł ITALIC", new Font(Font.HELVETICA, 20, Font.ITALIC)));
datatable.addCell(new Phrase("4. aacceell ITALIC", new Font(Font.HELVETICA, 20, Font.ITALIC)));
datatable.addCell(new Phrase("5. aącćeęlł STRIKETHRU", new Font(Font.HELVETICA, 20, Font.STRIKETHRU)));
datatable.addCell(new Phrase("6. aącćeęlł UNDERLINE", new Font(Font.HELVETICA, 20, Font.UNDERLINE)));
document.add(datatable);
document.close();

Expected behavior

• in 1. (polish letters) I should get bolded text
• in 3. (polish letters) I should get italic text

System

(please complete the following information)

• Windows 11
• Used font: HELVETICA
• OpenPDF version: 2.0.3

[vk-github18]

You can try an OpenType font like Noto Sans
See also https://github.com/LibrePDF/OpenPDF/wiki/Accents,-DIN-91379,-non-Latin-scripts

[andreasrosdal]

żądanie ściągnięcia, zapraszamy :)