Digsite Map Boss instant kill after death

Tier 11 Map in HC The boss died right before the animation started, but it was triggered regardless. Three seconds later I died instantly exactly like depicted in the footage I’ve posted bellow.

https://www.reddit.com/r/PathOfExile2/comments/1o0p6pm/how_does_one_counter_this_absolute_bs/

https://www.reddit.com/r/PathOfExile2/comments/1ndg4b2/post_boss_death_effects_have_to_go_move_not_safe/

I had the same issue with tier 15 map. I Killed the boss then I suddenly get 1 tapped during his death animation. Weird sh**. I have never taken any damage during his death animation so I am assuming it is a bug.