Text with background missing from output.

[Quaddroo]

Reproduction pdf, free to download:
https://bmjopensem.bmj.com/content/bmjosem/1/1/e000050.full.pdf
When converting it to markdown with no special tricks, I notice most text with a colored background is fully missing. This is not the case for Table 2, but all other tables suffer from this issue. The text is definitely present in the pdf.

I suspect this may be related by this code being commented, but not sure:

pymupdf4llm/pymupdf4llm/helpers/multi_column.py

        # for i in range(len(new_rects) - 1, 0, -1):
        #     r = +new_rects[i]
        #     if in_bbox(r, path_rects):  # text with shaded background
        #         shadow_rects.insert(0, r)  # put in front to keep sequence
        #         del new_rects[i]

I couldn't reliably gauge if any other open issues are related to this, but it didn't seem like it. I'll try and debug it myself if noone comes to the rescue.