I had just beat the Grand Regent at the end of act 1 and was standing by the Guardian of the Wild waiting for it to go back to normal, and the moment it did I just randomly exploded and died. From full HP, no enemies in sight. Elite difficulty but I don't think that matters.

I genuinely have no idea what happened. The only ideas I have are 1: The guardian does AOE damage when it goes from being corrupted to normal. I guess all that bad corruption or whatever has to go somewhere, so it went into me and subsequently killed me? or 2: Maybe enemies from off screen hit me? I don't know if they all despawn once the boss is killed or not, there were definitely some alive when the boss was at 1hp, I don't remember if I killed them afterwards, but I was standing still for at least 5 seconds, enough time for anything that wanted to attack me to come over. And even then it was an instant 100 to 0. I don't think it was enemies.

It just kinda bugs me, it was my first death and I have no idea what caused it. I wish I could watch what happened again. I have 250 hours in the game and never seen anything like it. Tried googling it but couldn't find anything. I know some enemies explode after death, but it was well past the time they would have exploded.

Maybe it does just do AOE damage when it becomes uncorrupted and I just never noticed. If so, I feel embarrassed for posting this. I don't really have the motivation to start a new character and play up to that point just to find out.