1-page PDF is blank when file size is greater than c.3.1MB

[AlexCT22]

I'm creating a simple 1-page PDF with the following custom dimensions:

• width 3555px
• height 2528px

The PDF contains some text and an image.

Everything works fine when the scale value is set to 9. The output PDF has a file size of 3.1MB. But when the scale value is set to 10 ,(i.e. the file size is slightly bigger) I get a completely blank PDF.

I do not believe this is related to the well-known max width/height canvas issue as the PDF is created successfully when the scale value is set to 9 or lower.

Just wondering if anybody else has run into this issue or may have some idea of what's going wrong?