Antem getting stuck

http://images.akamai.steamusercontent.com/ugc/278473670215136537/99581936F1CAEE04BC3F024FE9E29C47916B4E3D/

Supervisor Antem in our game decided to leap up onto that pillar and never come down, with an immune shield around him. We did manage to (very slowly) kill him with repeated Flashbangs and Tag Teams.