When you ask it to show you all the replies you don't seem to be able to then collapse the replies after it's shown all of them. After reading the replies one might want to collapse them (I certainly do).
The first part is related to #405. It's trying to fetch the replies from the remote server, which it can't.
As for collapsing replies again -- that's a good question. There's a mix of different behaviors for social software. Facebook expands but doesn't hide; Google+ expands and hides; Twitter expands and hides. StatusNet just expands.
I'll keep this issue here.