Infinite Rikti Portals in solo mission

[JelloMold]

In "Defend Portal Corporation" from Serpent Drummer, there are ten mission objective Rikti Assault Portals to be destroyed. These seem to all become active at the start of the mission, spawn bosses regardless of mission settings (+0 X1 No Bosses, No AVs), and spawn apparently an infinite number of enemies to the point where targeting or even seeing the portal becomes difficult-to-impossible. I don't remember this happening before while running RWZ missions. Working as intended?

 

Edit: added evidence

Edited March 10 by JelloMold

[Rudra]