(PoE 2 Glitch) Act 1 Boss - Simultaneous player and boss death glitches loot and portal

I beated the Act 1 boss with the result that i throw my finish strike and lower my guard, was at the same time blood raid was falling from the sky and insta killed me. After i returned to the arena, boss was killed and no loot/portal was there, so i needed to reach the checkpoint at first floor reclearing all the maps again.

Maybe this is an issue for the rest of the content, so i posted just in case this need to be a little bit reworked. Maybe giving inmunnity for couple seconds after boss death could be an easy fix for this scenarios.