I have cleared all the Security Drones involved in the Season of the Seraph, however when I check my triumphs tab, security drone 33 on Mars is unmarked. I have checked back several times to its exact location and it is gone. I also have all the drones marked as cleared in the Seraph Station but the door is still locked, stating that I do not have access to it, effectively keeping me from unlocking the sparrow and the secret behind the door itself. Would very much appreciate some help with this issue.