Iron Banner isn't counting a lot of the games played. I played 3 in a row for the pinnacle gear but only 2 counted. I was using the arc subclass the entire time. I started watching more closely and noticed a lot of the times after the game ended it didn't show any crucible or Iron Banner progress, nor did my commendations go up after getting 3 for that game...
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Atleast you are getting the daily challenges...it doesn't even appear for me neither does the weekly like wtf...I can't do the quest to complete 1 daily challenge because of this.