Is this considered as accidental exploit?

Looks like a bug, some sort of lag or net coding delay killing the same person over and over again.

You get a similar effect when a heal grenade / beam is reviving someone and you take them from Resurrection point to death over and over till the heal wears off.

Over kill count bugs like this need to be ironed out. Why this hasn't been done yet is beyond me so it must be working as intended.

I cant tell what caused this so it looks like a bug, and Konoko didn't look like they went out of their way or did anything specific or deliberate to cause it so isn't breaking forum rules.

So yeah, stumbled into a one off or rare bug which may be considered an exploit if a way was found to intentionally reproduce the bug.

I reccomend creating a support ticket here for the devs to try and find and squash it

Easy?
More like lucky

Looks like a race between fire DoT and vial healing.

Not an exploit. It was just the game going through a juggle between the "Alive" and "Downed" state of the character due to the oncoming damage and constant stream of healing.

The perfect moment where heal tic and damage tic alternate each other to rez then down someone.

Nerf fusion guns.

the heal is stronger than the damage. lol