Just got done grinding nightfall strikes for the Vanguard pinnacle weapon and guest what, the quest has not registered for me. I claimed the triumph already and went to see Zavala in the tower to my disappointment no freaking reward. Bungie needs to fix this ASAP😡😡😡😠😠😠😠😠😠😠😠😠😠😠😠😠 Can imagine doing this all over again. It's just sad at this stage.
So you finished the Triumph "The best attack" where you have to do 1000 precision Kills, 500 orbs and a number of Strikes and Nightfalls? Some Quests don't update automatically, you should receive the next Quest Step when you try to change characters or log out and back in.