Rather recently I've noticed that a lot of the posts that make it to the Hot Network Questions list stay there for quite a bit. For example, I was on superuser.com and saw the Hot Network Questions list that had the What is Hermione Granger's ethnicity? question, which I was sure I saw just only 5 or so days ago.
There were already a sizable amount of views and upvotes on the question back then, but then I noticed it's been happening for other sites as well with some questions I could've sworn had been up there for only a week before and was still in the Hot Networks questions list without much change in terms of upvotes or views.
Did something recently change?