page.insert_htmlbox() lose HTML label

[xiaolibuzai-ovo]

Description of the bug

bbox=[205.40769958496094,
            192.42880249023438,
            250.40769958496094,
            201.42880249023438]
res = page.get_textbox(bbox) 
print(res)   // <template>
WHITE = pymupdf.pdfcolor["white"]
page.draw_rect(bbox, color=None, fill=WHITE)
page.insert_htmlbox(
    bbox, res, css=""
)

Called a insert_htmlbox but didn't write anything back

raw:

result:

I am not sure if this is a bug, I hope to get your answer, thanks！

How to reproduce the bug

Vide supra

PyMuPDF version

1.24.14

Operating system

MacOS

Python version

3.10

[xiaolibuzai-ovo]

use insert_textbox is also

[xiaolibuzai-ovo]

I replaced the label, but still no result，Who can help me

[xiaolibuzai-ovo]

Look this, I replace the template label

[xiaolibuzai-ovo]

@JorjMcKie Sorry to bother you, but how can insert_htmlbox avoid this problem and why insert_textbox does not work