Couldn’t get a proper video of this so I will try to detail it.
Looking at a guide for the Shade of Orobyss Physical Form and the Blood Orb mechanic… the blood orbs are supposed to follow you. They do not follow me in my fight, however (playing solo, not with a group)
The blood orbs spawn and move out towards the edge of the arena, however I still get hit multiple times by blood attacks and die. They do not follow me. It seems to be a mismatch between visual and attack. I thought it was me not understanding the fight, haha. But the fight is very difficult to do with this bug.