I almost died 5 times during the fight, in fact when I won, I was down to 15% health with all my cool-downs being used up, I had unloaded everything I could in the 1 copy of Izzy which was almost dead and once I killed that one, it ended the encounter. I probably would of died for sure had the second copy not gone away once I killed the first one.
Anyway, I came on here to report the bug in the Bug Forum, but it looks like several people have reported it, and everyone seems to say that it happened after they skipped the cut scene.
This is my 4th hardcore character to beat Izual, and I know I skipped it every other time as well, so it seems to be timing related, or may have to do with lag server side at that exact moment, but just in case for those hardcore player I suggest not skipping the Izual cut scene until they can fix this bug.
All I can say, is I was one lucky Wizard to survive the double freeze mangling they were laying down on me.