Evidence on Public vs Private Law Enforcement From Bail Jumping [pdf]

I think this is because OP simply copy/pasted the title. having an all uppercase title is annoyingly common especially in pdf's.

seen this on some websites too which have uppercase head styling and you have to dig out the normal format from the open-graph header (or add it to buffer which is the same). Noticed some sites that do have all upper have JS to convert the to lower when copying the text (example: https://www.emptywheel.net/)

I guess it could be solvable by adding some conversion on the HN submit form.