The exported PDF file is missing content

[AptX395]

Hello, the theme you developed is very beautiful, especially its double-column layout! Thank you very much for your work!

Unfortunately, when I tried to export a PDF file under your theme, I found that a lot of content was missing in the file.

Specifically, only all the first-level headings and the content under the first first-level heading are retained, and all the content under the other first-level headings are lost.

Do you know the cause of this problem? How can I export the PDF file correctly?