I grinder duos and was in the top 10 on all of the boards, all has been reset. Even got 3 wins in a row today and it got rest to 1 , all my kills set back to 1, the only reason I can see this has happend is I was with a random and my friend sent me an invite, I had left the game to play with him?
This has been addressed in the season 3 thread leaderbords are broke that's just how it is in season 2 but when season 3 starts hopefully all will be fixed with new leaderbords system
