Converting to PDFs loses pairs of brackets

[longnh]

Hello everyone, I'm using PDF-Xchange 10.8.5 PDF-Tools to convert DOCX to PDF, but I've encountered an issue that is described as below:

• A pair of brackets in MathType formula (shortcut: Ctrl+() will disappear after converting to PDF

• The bracket that is typed by keyboard key is retained

• I've checked that all the necessary fonts are installed

• This issue doesn't appear with PDF-XChange Office2PDF

• This issue doesn't appear with Adobe Acrobat

Please tell me how to fix this. Thank you so much!

[Daniel - PDF-XChange]

Hello, longnh

Could I possibly request a copy of the problematic Word document, and the resultant output, from both our software and acrobat (for comparison).

Kind regards,