Empty drawings for some documents

[vkovenko]

Greetings. I found the following interesting issue while using pymupdf for svg extraction.
Method get_drawings returned empty list, while method get_svg_image worked out successfully. The question here is why get_drawings returned empty list if svg image is available (maybe just theoretical causes of such behavior)?
Additional details:
PyMuPdf version: 1.21.1

[JorjMcKie]

The SVG image of a page primarily is an image trying to resemble a true appearance. It generates drawings for each text character if you don't prevent this with the option.
It is independent of the fact whether there also are original drawings on the page.