Is unholy Blight bugged?

[:1]I haven't used this talent since WOTL cause I wanted resilient infection instead. I just changed my unholy spec and picked it up but noticed that when I cast death coil on a dummy, there's not DoT at all that ticks. I know the DoT isn't supposed to be high dmg but still, shouldn't I see some unholy blight DoTs ticking from it?
It's not bugged.

It does 10% of damage DEALT.

If you hit a dummy with 1 hp with a deathcoil for 5000 damage, that did 1 pt of damage and 4999 overkill.


So UB would deal .01 points of damage per second for 10 seconds, adding up to .1 damage. This is rounded down to zero.



Try it on something with a hp pool and it works fine.