Digsite Corrupted Boss (Nexus) Bug

Steps to reproduce:
1. Start the battle with Aurelian.
2. Deal a lot of damage to switch to the second phase.
3. Kill Aurelian at the beginning of the second phase.
4. The Nexus boss will appear, and at the same time there will be a global strike on the arena due to Aurelian's mechanics ( but this boss is already dead)
5. Die from this strike on the arena.
6. Resurrect.

Expected outcome: continuation of the battle with the boss of the Desecrated Nexus OR a new attempt with Aurelian.

Actual result: there is no Nexus boss, the map is completed, the quest is completed, but there is no reward: the drop from Aurelian has disappeared, there is no crystal knowledge core → the time spent on the Nexus core is wasted.