Dark Empathy bug for the Necromancer

[Ranto]

It seems this talent doesn't take into account the talent modifier - each level seems to grant a 20% damage reduction from minion damage, but with four points invested in it (effective talent level 5.2 - if the standard 1.3 multiplier is applied) it's still only granting 80% damage reduction - according to the talent text.

Is this a bug, or working as intended?