I need help with the same problem using 3.3.0. Essentially, I created a docx template and my code replaces tags in the form ${tag} with the desired text. I use JAXB for document text, table text, etc., and it works well but it doesn't seem to work for header and footer text. I've found examples on how to create a header but I'm really looking for a concise example on how to find a tag in a header and replace it with text.
Any ideas out there?