Am I right in thinking that an unholy weapon cannot take someone's soul if the weapon's attack type is elemental and the victim is shielded from that element?

For example, invoker has oozeshield up and gets killed by an iceball because he doesn't have frostshield up. Weapon with acidic attack type wails in anguish as it fails to grab a piece of victim's soul.

Is this by design? It seems to me that when someone's soul is release the elemental shield would not be an issue by that stage.

Either way is fine with me. I wanted to make sure it is by design though, because usually when I assume it is someone else gets it changed a year later.