I can’t upload a screenshot because Connect is giving me a weird error (Sync doesn’t have posting at all yet), but when I look at the comments, a lot of the top level ones have been replaced by a button that says “View Parent.” Pressing it seems to sometimes show the parent comment and sometimes just skip down to the next thread.
I’ve seen a few people mention this and I have it, too. I think it’s related to sorting.
This seems to be it
Those screenshots match some cases I’ve seen of the bug, but a lot of the time, it’s the very top level comment that’s hidden. It’s most likely the same bug though, as I do sort by Top. I’m glad I’m not alone!