What you are reporting is not a bug.
Blizzard’s stickied How to Write a Good Bug Report says…
That should get you to another stickied thread…
The power of Death’s Bargain is…
Gain an aura of death that deals 792% of your Life per Second as Physical damage to enemies within 16 yards. You no longer regenerate Life. [750 - 1000]%
A quick look at your Wizard…
…confirms that she has these in the Cube’s armour slot.
Read what your legendaries do.