Please upgrade to 2.2 here.
The 2.0 and 2.1 branches are no longer being updated.
Replies losing state after edit
This discussion is related to the ReplyTo
This seems to be a bug, looked at the code only for a short bit, but was not able to trace it down.
How to reproduce:
Write a reply to another comment
Hit the Edit button on that reply. Modify the text and save.
Comment is now not in line any more and has no "Reply" link any more
Comment is still in line and they still can be replied to