@gundersen Aha! Figured it out… it’s not the scrolling.
So the Kitten Kawaii web site is embedded in the blog post and the Kitten Kawaii web site maintains state in the URL. Of course, you can’t see its URL because it’s in an iframe but it is still adding its state to the history and, apparenty, that’s not a separate history for iframes.
Interesting…
You can see what I mean by hitting it directly in the browser:
https://kitten-kawaii.small-web.org
:)