Not sure if this is user error, a lemmy issue, a jerboa issue, or just inactive communities. A lot of communities I'm subscribed to, with many active members, show no posts more recent than a week or a month. At first I thought this was just a lack of activity, but recently I noticed that a post I had commented on was not visible from the community page (under either hot or new), although I was still getting replies and the post is visible from my comments page.