There’s a bug right now that causes the hot sort to stop updating. A partial fix will be coming out with the next update. The “hot score” decay is actually very aggressive on Lemmy, so normally posts should fall down the ranking very quickly.

The hot sort appears to be frozen for the last 24 hrs. The top posts on all or local haven’t changed in nearly a day. There appears to be a bug causing a deadlock in the database (see issue 3076 for more info). The only solution seems to be to restart the instance when that thread crashes.