Pseudo Death, partial control after death???

Exampled 1:
https://youtu.be/ls5qMe8IqOA

Example 2: (does not demonstrated the control bug but does demonstrated random death)
https://youtu.be/u7UNfJ9CTis

I believe this is not intended behavior. I die to some unknown entity, my life is 0, but full ES. (Chaos Innoculation) (no i do not have a flask that causes damage to my life to replenish mana) and I have some control of my character. But they are effectively dead. As demonstrated in the video, my characters body is on the ground, but I can move a little and turn around, and suffer damage to my ES. and then once my ES reaches 0, I truly die.

This has happened several times, and I usually am not close to enemies when I die, and as far as I know there are no death effects around me nor am I hit by anything like a trap or stray projectile.

Ive lost at least a levels' worth of progress and several good maps because of this.

Edit:
I believe its an interaction with berserk spirit gem. Something about the "0.1% of life per rage per second while not losing rage."

I guess its more of a mechanical question, if my max life is 1, and 3% of 1 can ever reach a whole number, and it doesnt seem like your life can be less than whole numbers, how do I die to the life lost?