Endgame map crashes game when getting near boss PoE 2

I played a map that had delirium and a map boss. Entering delirium and clearing the map as much as I can. I get to the big boss wilst still inside the delirium (the boss is in another instance? or has "arena portal") I get a countdown from 5 to 0 and the game crashes. I didn't click the boss arena yet. After that I load back in and enter the map. I get close to the boss arena again but the game crashes again every time I get close (this happened 5 times and the map closed).