tbh i suspect, but this is just especulation, regarding 3v3 arena, if you dont go with a premade, you get matched vs other premades (most of the times), buuuuut, when you go with a premade, it's 50/50 chance you get another premade, now you tell me what are the chances, same thing, the same source code wasnt applied to SWB, bonds or arena, or even ranked arena...

P.S: 3v3 when i get my 2 wins, i usually give out wins to other people cuz i know how hard is 3v3 for some people, i struggle too, especially vs 3 AGK's