I don't know if this only happens but most of the long reply I get, or see on other posts, are hidden. I can only view these in the inbox section, and no, it's not my VPN I tried it without too and got the same results. Also on my own posts I simply cannot see any of the parent commwnts (happens on this post as well)
Recommend Jerboa, I also have small amounts of comments that can't be loaded. Not in this thread, at least for now.
Can you include a link of your thread, check whether there's a pattern.
the thread