I was wondering others have this problem. I see a comment. There'll be a few replies to that comment and then a roll up of the remaining comments will be there. I'd expect tapping it will unroll the comments. But when I do, the bar changes to a rotating arc icon, and then return to the rolled up status. Which is to say, tapping it doesn't unroll it.
Oh... That could have been it. I connected that when I first blocked someone, but obviously forgot about it. It would be nice to have an indicator like "comment from blocked user" or something.