I turned off my audio round 30 to listen to spotify uninterrupted so I thought it was an audio hint on what happened, but after reviewing the gameplay, I seriously have no clue how the ADU was still taking damage after the round ended and it should have been gone when we started the final boss. Any clue what killed it? Last I check before finishing off the tormentor, it was around half (a little around the bottom corner of the diamond). Unfortunate that it was final round boss, but it is what it is, just would like some rationale behind the failure and for this to be fixed so it doesn't happen again or even on legend difficulty.