Proposal for Persistent Boss Nodes in PoE2 Map/Atlas Mechanics

Boss nodes or specific boss modifiers should remain on the map/atlas even if the player fails the encounter. While other modifiers probably should be stripped upon death to prevent "farming" or exploitation, the Boss entity itself should persist.
If the goal is to defeat a specific threat, that threat should remain until it is actually neutralized, even if the "optimal" conditions for the fight are lost.