I have made the same post about Medusa having this same issue where she goes less damage the more armor reduction is done , here is the link ..
https://forums.playcontestofchampions.com/en/discussion/24497/medusa-bug-against-red-hulk-in-lol#latest
As per pics , once Hyperion places armor break he does way less damage to RH.
Note the attack’s on this screenshots are light attack’s . I do have the video recording of this if needed .
