Can anyone explain why swriter is not converting this checkbox correctly to PDF from docx?

Can anyone explain why swriter is not converting this checkbox correctly to PDF from docx?
swriter --headless --convert-to pdf:writer_pdf_Export --outdir C:\Users\ C:\Users\checkbox.docx

See Attachment.
checkbox.docx (15.2 KB)
Try converting. If any solution please share.

Duplicate of Checkbox when converted from docx to pdf using swriter (libreoffice) becomes unchecked - #2 by Steph1