Small update for anyone who had the same issue as me (and I know some of you did). The Iconoclasm mission crashes on any platform [b]as soon as the Witness sees you[/b]. It is possible to finish the mission if it never sees you. There are plenty of walls to hide behind; use a sword or an emote to look in third-person during the moments when the Witness appears and disappears. There isn’t really a DPS phase, so the mission is completely doable despite this bug. With a friend, it took us about 5 tries to clear it, and we’re average players. Hopefully Bungie fixes this problem quickly, and maybe this message will help them identify the issue. In the meantime, take it as a challenge to overcome :P