They have been tuning the algorithm for that in the past releases, so may be related to that. Also, there is/was a bug where if you don't restart lemmy (on the server) regularly stuff will get stuck at the top of hot and/or active.
That makes sense, figured it’s some kind of growing pain. Wanted to make sure it wasn’t something on my end. I’ve only noticed if the past couple days.
The Lemmy site itself does have sorting problems as of right now. Try to use wefwef.app, Memmy for iPhone or another Android app. They seem to work fine!