Glutmaw doesn't work as indicated

Platform, device version and operating system:
PS4, GoW version # 4.4.0.09
Screenshot or image:

What you were expecting to happen, and what actually happened:
Glutmaw’s ability: “Curse and stun an enemy. There’s a 25% chance to devour a random enemy, boosted by enemy deaths.”
The devoured enemy appears to not be random, it appears to always be the target you select to stun/curse.

How often does this happen? When did it begin happening?
I haven’t experimented in multiple game modes and don’t care to. But I had already suspected this while doing delves that were going fine. Then I had a delve go poorly (hero died 3rd fight) and I full cleared the rest of the delve primarily with glutmaw’s devour for “damage”. Not once did an enemy besides the target get devoured.

Steps to make it happen again
Use glutmaw’s ability until the devour effect happens, with multiple enemies still alive. Observe if the devour target ever deviates from the stun target.

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