Not sure what’s happening with the ranking algorithm, but it seems like the default main page is still displaying the same set of popular posts from a few days ago.
But if you switch to sorting by “Top Day,” it’ll show fresh popular posts from the past day.
I’m glad to hear the issue with the Hot algorithm is a bug, but the Active feed seems to be almost completely static as well and has been that way for a while. It’s been all the same old posts basically the entire time I’ve been on Lemmy. Hot was the escape hatch for me until it stopped working as well, but I feel something needs to be adjusted with Active too in addition to fixing Hot. Especially since Active is the default.