Today's (6/19/2016) daily heroic story mission "Paradox" is not giving legendary marks and is not showing as completed in the Director after completing the mission. I've completed the daily heroic story mission today twice and it continues to show in the Director as uncompleted and I've not received any legendary marks for completing it.
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Guys, everything is broken right now. Literally everything. Just put Destiny in the trash and move on. It's time bungie dies for good. Maybe 343 can take over Destiny 2...