I just played through the campaign for the second time (but for the first time with my Hunter) and I was under the impression that you could get the Parasite quest each time on separate guardians. When I talked to Ikora after defeating Savathun, she instructed me to go speak with Mara. Unfortunately; Mara has not loaded into the area so I have been unable to acquire the Parasite quest. Has this happened to anyone else? Anyone have advice? Thanks!