[akoboldfrying]

It's been a while, but I vaguely remember that the hyperref LaTeX package for making URLs didn't play nicely with certain other packages -- possibly with one of the citation packages.

Sorry I can't be more specific. I definitely have memories of reordering \usepackage{} statements until "it worked"...

[susam]

This is correct. In fact there is a highly upvoted question about it on TeX Stack Exchange: <https://tex.stackexchange.com/q/1863>.

See also <https://latex.org/forum/viewtopic.php?t=25156>.