So My Girl and I host aram games on here, when somone rage quits cuz they didn't get the champ they wanted etc it duplicates the names of random individuals in the room. could be summoner 4 on purple or myself. knowing that sounds confusing it happens after some one leaves the game when you find yourself back on the team selection screen. this happens to both of out computers but when we ask other people if they see the duplicated names they decline. It's possible it's some thing on our end
make a game with humans 5v5 on proving grounds is what we did.
Have some one leave randomly.
See if anyone sees some ones name twice.
(When some one joins the game Lobby the problem auto corrects itself but unless you watch it like a hawk it's difficult to tell when the room is actually full once some one does in fact leave)