Don't tell me it's against Emma
Who are you using ?Cause apoc is stun immune at 3 charges,Prof x you cant parry his non contact so it could be that, mags if you use a metal champs you'll likely not parry
Apoc starts with two genetic code as a defender, or three as a final boss of the quest (which he is in the side quest). Thus he starts in the side quest with his stun immunity while attacking already active.