I noticed it, too. It's especially annoying when viewing the site on the phone using the phone's browser, because when I tap a thread, it takes me to the first unread message, then reloads the page and takes me back to the top.
I've also noticed on the laptop, in Chrome, if I set it to not accept third party cookies, the EO page loads, and then constantly refreshes, stuck in a loop.
I have no idea what's causing it (well, I do, sorta), but I'll have
JoshM take a look at it. Might be Monday before he's online.
Whatever it is, I didn't do it.