the problem
Magneto causes armour break on metal champs running suicides and those who are bleed immune, including Ghost.
I'm going to lay down the evidences for
1) such an interaction exists,
2) why (I think ) it is a bug
1:


Most Abilities of Magneto is due to the Magnetization passive and abilities associated with it.
He only ignored miss if the opponent is magnetized.


He only ignored class disadvantage if opponent is magnetized.


So, he should only cause armour break on bleed immune champs when caused to bleed only after magnetization passive is applied
Tl;dr: magneto is appluing armour break at fight start to bleed immune metal champs running suicides. this is a bug that should be fixed