fury group invis problem?

[Kaknya]

I was playing with a group from my guild sunday and anytime anyone harvested it droped invis for everyone. shouldn't this just be droping the invis for the person trying to harvest? Or is it killing it because it is a radius type spell?

[Joren_Wolfheart]

It's from the radius.  This happens any time anyone uses any abilities (even sprint) while under group invis<div></div>