Some bugs I noticed:
Searching for Zurich allows you to go to the article for the canton of Zurich, not the city. Clicking the link "Zürich (city)" inside of this article, opens this same article again about the canton, rather than opening the actual article for the city
When viewing an article, the search for articles (leftmost search box) doesn't seem to work at all for me (in Firefox). When being on the main page, it does work
There's a small clickable 'home' button on the right, but muscle memory from how other websites work makes me expect that clicking the big title "Encyclopædia Britannica, 11th Edition" on the top left also goes to home