Bug in new Boss P2?

[Kovu]

Hey,

we was in 10er raid a few minutes ago, try to take him down.
P1 is easy, heal a little bit difficould. 4 Adds nuken, tanks spot, ready.
But in P2 we don't get the poisen away!
The one with the poisen run in the green cloud, but nothing happens, some times is working, some not.
Ideas?
Bug?

[jjcoola]

Read the ability list

[Kovu]

I Read it, but don't understand the hint, sorry.