I have just finished foundry heroic with the exact same issue, getting revan to appox 20% on average and then just getting one shot by him. We had 3 people that can interrupt and we know we did not miss one. Even when tanking all CDs popped and bubbled I was still getting one shot. If anyone else has had the same issue then please say so, or if you have killed him and if there is a way to get around the bug ? Many thanks Defence, Luka Sene