Compiler Skin did Not Unlock after killing boss

Hey bungie, while on the last day season 1 cryo, our lobby helped eachother kill compiler before season ends. I shot the boss many times and looted it and was the only one my squad that did not receive the acomplishment. I really badly wanted to acomplish this goal and get the skin with assassin shell i extracted with. I would be very happy if this bug can be fixed so i can receive my skin/reward ( can show video proof) thank you Bungie. id: atspace#6766