I was playing solo and got the Prismatic subclass, a friend got online at the same time, I decided to leave the mission and join him, when we reached the spot you get Prismatic it wasn't there and he couldn't get the subclass. Gonna try switching characters, playing up to that point, and inviting him. Can't switch characters at the moment, HEAVY contacting servers messages and battle eye crashed after being in orbit for a bit after skipping the cutscene, twice, not gonna skip next attempt.