Cortex softlock

I played a regular cortex with maven witnessing.
During the roleplay after the last phase of the boss and the loot drop I opened a portal and went to hideout.

Upon reentering the map I neither got completion for maven witnessing, no loot, boss animation did not pick up again, and I can no longer go back into the map area. I am locked into the boss arena that is not finishing.

You have to stay in the map until the death animation completes and loot drops. Its intended.

The only part that is a bug is the portal to the main area not coming back.