Hi bungie, let me preface this by saying every user here is gonna hate me. I wanted to get a group for crota checkpoint and did that earlier. One member showed us how to "cheese" him sorta and I wanted to tell you so you could patch it. Because honestly I hate people that cheese things. Totally beats the fun of the challenge. That said, here's the bug: when you are at the checkpoint for crota, have one sunsinger with self revive. We killed all the enemies except one knight that spawn in the initial room without exiting the room or dying except one Knight. We waited around until the sunsinger had his super up, then we let the knight wipe our party. After he killed us, we waited for the restart clock to get to 3 seconds, then the sunsinger self revived. This caused the "presence of crota" ailment to be permanently removed. Our health/shields regen as normal and the ailment did not return so long as we did not grab the chalice of Light. Doing so returned the ailment. Just thought you might want to address this bug before it makes the rounds in the community