Also, I should mention that I'm a little wary of reporting this bug, as I'm afraid it might be abused by losing players, so feel free to remove this thread if you share the same concerns as me.
So here it goes:
The bug is very simple. In a 1vs1 (NOT 1vs1q mode) if you are winning and the losing side is the lobby creator, and he rage quits by (most likely) closing the game tab, you end up with the message "you have been disconnected from the server" without getting any xp\shards.
Now, this happened to me on an S sized custom map, so it's not that frustrating, but just imagine the possibilities...
