Omen of Ressurgance doesn't work

I've died 3 times with this in my inventory. I thought I was just getting one shot and never going into low life territory but I just saw my life dip to 5% and it still didn't go off, almost entirely empty health globe and no activation.

Did you right click to activate it. Not sure obvious but thats what you gotta do

Holy shit hahaha didn't work like that in poe 1 LOL cheers

Just wanted to add my experience, during a typical map boss fight, I have the omen activated and have seen it not go off twice now this week. Not sure what is going on because it use to work without any issue but something seems to have changed. After I died, I still have the active omen in my inventory. It is clearly not working anymore.