Map 3 miniboss not taking damage.

Cujo999

I was fighting the second Map 3 miniboss AV with my duped 4* 5/50 Hulk. Got him down to 10% health, baited his heavy, then hit him with a 5 hit combo. After eating that, he's still sitting at 10% health. Hit him with another combo and he took damage normally, but it's frankly a little ridiculous that he's shrugging off full combos without taking damage.