My full hp soldier who just exited the Scarab and finished off a Triton just instantly died. Bug? Or some marvelous ability of the Triton?
Edit: It just happened again, same mission after restart (save haven), this time another soldier just finished off an Arthron.
I had this on the mission you do for Anu, I think (or it could be the one for Synedrion) where you have to clear out some renegade soldiers.
My heavy launched a grenade off of a roof killing an enemy soldier, then promptly dropped dead. The explosion was like 10 tiles away.
Nervous disposition, probably.