My clanmates and I spent a few hours grinding out the notorious triumphs for Reckoner yesterday. We went in as 3 stacks and 4 stacks, each person running a different armor set. The Sentry "Locksmith" medals and the Collector "Half-Banked" medals were functioning, and our Invader was making progress on his Triumph as well. Despite this, neither myself nor our other reaper got any massacre medals the entire night! We heard the voice lines associated with the Massacre Medals, myself about six times and our other reaper reported hearing three drifter Massacre alter voicelines. Despite this, no medals awared. Is this a known bug? Is there any way around it?