Hello,
If you set the addCrossRefence method as type heading an internal bookmark is created (before and after the heading). To do it works the referenceName option must be equals to the heading text content.
The easiest solution is creating a custom bookmark with addBookmark or with MS Word if you are using a template. Using DOCXPath you can insert a custom bookmark anywhere in the document.
We move the request to the dev team to add new cross-reference samples.
Regards.