Text between ++ and ++ should not be underlined

I am using this code:

License lic = new License();
lic.SetLicense("");

Document doc = new Document("in.md");
doc.Save("out.docx");

Problem is, text between ++ and ++ should not be underlined. Here is source, output and expected files.

test files.zip (5.6 KB)

@a.zampa
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): WORDSNET-27318

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.