Yesterday I was playing (US servers) and a guy asked me how ‘xyz’ (can’t remember the name) was going. I asked who that was and he apologised and said I must not be the person he knew and that apparently me and that other player have the same IGN at the moment. (I got the impression that ‘xyz’ was either the wife or a friend of the other player with the same IGN as I).
I recently changed mine and I am surprised it would allow duplicates. If indeed is happening I’m not sure which company would be responsible to take care of this bug as I did it in the Nexon launcher.
On a side note, this would open some good trolling opportunities 
