Panth Shield blocking Liss Ult

Please explain to me how Panth shield is coded... really I'm interested. From my understanding its basically a mobile Yasuo Windwall+ Braum Shield. So how does it block the dmg portion of Liss Ult? This ult is not a projectile, it does not leave the body. Its a point and click ability, that emantes from "Within" the target. It will stun panth, just does 0 dmg. Please bugfix or provide an explanation of this, as this is not the case with braum E.
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