Embed ZapfDingbats in pdf

hi,
There is something wrong after I embed ZapfDingbats font into PDFs, the text does not display. Please see the attached files.
Please help to check.
Thank you so much!
Jason
ZapfDingbats-_fontEmbed .pdf (7.4 KB)

ZapfDingbats-before.pdf (5.7 KB)

@Jason_yi

Would you please also share the sample code snippet for our reference so that we can test the scenario in our environment and address it accordingly.

Thank you sir,
This is the sample code.

var document = new Document(filePath);
document.FontUtilities.SubsetFonts(FontSubsetStrategy.SubsetAllFonts);
document.Save(filePath);

@Jason_yi

We have opened the following new ticket(s) in our internal issue tracking system and will deliver their fixes according to the terms mentioned in Free Support Policies.

Issue ID(s): PDFNET-56232

You can obtain Paid Support Services if you need support on a priority basis, along with the direct access to our Paid Support management team.