QuantaMagazine.org orphans all annotations

Steps to reproduce

1. Annotate any particular individual article on https://www.quantamagazine.org/
2. Links to the annotations are redirected back to the root domain and not the individual page

Expected behaviour

The links should direct to the canonical URL of the article

Actual behaviour

All the annotations to individual pages seem to automatically become orphans and are associated with the root domain instead of the individual permalinks.

Example: The annotations at https://hyp.is/lUpgtn15EeivjHMsJK03Tg/www.quantamagazine.org/ and https://hyp.is/6C98en11EeieFgMy1hP9tQ/www.quantamagazine.org/ on the page https://www.quantamagazine.org/mathematics-shows-how-to-ensure-evolution-20180626/ don’t resolve properly because of the orphaning issue on this website.

Browser/system information

This is happening to me on a variety of browsers on Windows 8.1 and Windows 10 including: Chrome 67 and Firefox Quantum 60.0.2 (64-bit).
It also appears to be an issue on both the current versions of Chrome/Firefox on Android v8.0.0

Additional details

I’d guess that the issue is site specific to quantummagazine.org somehow.