That said, just to clarify, when you say you’re “unable to reply to them” do you mean because their comment doesn’t show up on your side, or because you get some kind of error or other weird behaviour when you try to reply?
Their comment is there (at least some of them are) but I cannot reply. My comment doesn't enter in, I just get a spinning wheel, with the text box effectively switched to Preview mode. I don't think it even times out, it just keeps spinning until I close the page or hit Cancel.
If I then log in directly to kbin I can reply to them there (and I also sometimes see other kbin comments that aren't on lemm.ee), however back at lemm.ee my new comment isn't there. I haven't gone back to check any of these replies later, I imagine they show up on lemm.ee eventually, but have no idea how long that takes.