A couple of times, now, I've posted on a thread and seen that post in the thread... and then come back a few hours later and it's vanished. No deletion message or anything - just as if it were never there at all.
Is it just me?! I'm not paranoid enough to think there's some sort of shadowbanning going on, but it is a bit annoying to find that your pearls of wisdom have vanished. This happened to me in the Emily Oster breastfeeding thread (I posted in reply to a comment about mixed feeding equalling only formula feeding), and on another thread I can't remember because it was about a week ago.