[Client] Specific account is shown as being 'online' while in game

My friend's account, afknoitemwarrior, appears to be online in the client, and even can be invited to a queue, when he's in a game (an error message pops up when invited). This bug happens every game he plays, and with other friends of his, so it appears to be linked to his account. Anyway, a minor bug, but pretty annoying when trying to coordinate a queue because it's impossible to distinguish when he's finished his game or is even in one.