The "Import Form Data" action of the bookmark cannot be read

The third bookmark in the pdf file below has added the “Import Form Data” action, but the bookmark.Action And bookmark.Destination are both null. How to identify the bookmark type ?
image.png (35.1 KB)
1.pdf (87.0 KB)

@CharlieChu

Thank you for contacting support.

We are afraid this may not be identified with the API. Therefore, a ticket with ID PDFNET-46675 has been logged in our issue management system for further investigation and resolution. The ticket ID has been linked with this thread so that you will receive notification as soon as the ticket is resolved.

We are sorry for the inconvenience.