I tried it again, and this time it worked Maybe the first time my name couldn't be restored because of my connection. I'll remove my post in Bug reports.
Sorry to bring up an old thread but i think i have found another bug in custom names. When i create a multiline nickname using the /nick command and sign out and sign back in, the character equivalent to (enter) is gone and my nick is no longer multilined. Sorry if this has already been brought up