So got an issue where I can't unlock the Pit of Heresy for whatever reason and the very first Shadowkeep mission keeps popping up all the time no matter how many times I complete it, I've legit done 3 runs already of it and have 100% done the entire campaign and thus far have not once been able to do Pit of Heresy once. Is there anyone who can help with this issue? I am currently unable to complete one of the Solstice Armour objectives due to this problem.