There is a JS library script tag on the site to try to correct the worst widows/orphans and some other typographic defects. It's after body load so as not to slow time to first paint and I don't think all browsers correctly readjust multi-column layout after its corrections/adjustment.

The caniuse statistics for CSS native support for widows/orphans correction is much better today than when I last worked on this CSS file: https://caniuse.com/css-widows-orphans

Novel to web pages, is what I meant. Software such as TeX and MS Word have a considerable array of (sometimes quite complicated!) tools for dealing with such things, and the absence of such concerns from web development was something that I had never really thought specifically about until seeing a heading appear right before a column break on this article, followed by an orphan in the next one.