Radiobutton checked value bug: works in all pdf viewers except Acrobat Reader.
"Checked" radiobutton value is only working in Acrobat Reader when:
First radio button value is "0". Radio button values are consecutive integers.
https://github.com/danfickle/openhtmltopdf/issues/547 — here I spent several hours to identify this issue.
See the file attachment.
Displays in different viewers: see file attachments.