Bleeding Immunity vs Vulnerability Curse = Bleeding

When one is immune to bleeding (but either map mod got Vulnerability Curse, altars got Curse Reflect etc.) he still gonna bleed.

I had 2 such examples (occur very often):
1.) Flask Bleeding and CF immunity + Mageblood
when cursed you still gonna bleed, but you never gonna take CF debuff
2.) With Passiv Tree Immunity: Armour and Evasion Mastery -> Immune to Poison or Bleeding, with helmet having higher armour than evasion

I guess its coded like:
Bleeding immunity = 100% avoidance
Vulnerability = -20% chance to avoid
so u get 80% avoidance when Cursed when immune

This needs to be fixed if true.