Question from lemmy noob. Why does the feed constantly update?

Maybe I'm too used to reddit. But on any sort type under "All", I get constant feed updates with posts under 1m old. Sometimes they come so fast that I click on the wrong post.

This is kind of annoying to me and doesnt match the intent of the sort filter. For example, "hot" shouldn't show a new post with no comments created 1m ago.

Is there a reason to this?