Export as PDF in Safari is not working

When I'm using Safari and I find an article that I want to convert to a PDF, I choose File --> Export as PDF --> Save.

The problem is that sometimes (not always), instead of saving the article on multiple pages, it saves the entire article as one page that is very, very long.

See the one thumbnail and see the page size at the bottom of the frame says 17.57 x 76.32 in. I've tried to figure out 1) why it happens, 2) why it only happens in Safari and not other browsers, and 3) how to fix it when it does happen. So far, I've not been able to find any answers.

Here's a link to the article I used as an example if you want to recreate the problem: https://www.ganoksin.com/article/precious-metal-clay-101/

I tried the Adobe forum and no one could explain why it happens. Since it only happens in Safari, I was hoping someone here might know the answer.

Thanks!