unfortunately the pdf itself has some typesetting issues. Whats about all those overflowing boxes and the small black boxes all over the document?

You can't tell from the URL, but this link is to a preprint [0], and the bad boxes there are intentional, since we compile all the preprints in draft mode [1]. The final article will be published some time in August [2], and should be perfectly typeset.

[0]: https://tug.org/tug2026/program.html#:~:text=Clemens%C2%A0Lo...

[1]: https://tug.org/tug2026/cfp.html#preprints

[2]: https://tug.org/TUGboat/#:~:text=vol%2E47%2C%20no%2E2%20%28T...