Incarnation of Fear bugged - Periodically missing the "damage link beam" from boss to the orbs.

Hello, it appears that Incarnation of Fear (85) fight is currently bugged, is not loading up models/particles properly. Upon dying in the fight, it fails to re-create a visible beam going from boss to the orbs - but even invisible, it still does damage.

Can be seen below
https://www.youtube.com/watch?v=XQWncQ-ccl4


Quick edit - seeing as this might be a graphical problem, specs as following:
4070TI
2560x1440 res - no upscale, windowed mode.
DX12, Vsync off, 3buffer disabled, AA Quality Off, no upscale, shadows default, shadow quality low, sun shadow quality low, number of lights medium, bloom 25%, DOF disabled, Water detail level high, texture quality high, texture filtering trilinear. Dynamics disabled, engine multithreading enabled.