Font substitution not working for me

While converting docx document using GroupDocs.Conversion for Java. Font Substitution doesn’t work as expected and Couldn’t make default font to work.

Font Substitution works for some originalFont and subtituteWith font,but doesn’t work for many. I want to understand why it works for few and not for others.

I have attached sample code I have used. Times New Roman, Courier New don’t get substituted. ConversionTest.zip (71.2 KB)
This test is done on Linux using GroupDocs.Conversion_21.7.

@SubratMishra

We’re investigating this scenario. Your investigation ticket ID is CONVERSIONJAVA-1388. We’ll notify you in case of any update.