Darius stops healing from his spin,

I was fighting a full glacial team with a chogath, and my rank 3 Darius was getting perma-stunned (btw mind fixing THAT?).

But, in between the stuns he performed the wind-up for his spin, getting stunned again. But then his heal didn't go off! He dealt damage and everything but no health came from it.

EDIT: Mystery solved and my bug report has changed. FIX RED BUFF TOOLTIP. It doesn't say you can't heal! I was pissed off and confused for nothing!