I just noticed that some threads are empty (only the OP is visible), but if I read it from a different account (account B) on this same server, I see a whole bunch of replies.

When I refresh this thread from account B, it's now empty, and then later it's back to full.

But, from this account (A), it's always empty. I can access direct posts if I enter the direct link in the search box.

I guess what I'm saying is that