Something in Xayah's Passive ability seems unintended (based on ability video).

So Xayah's Passive "Clean Cuts" says it makes her autoattacks pierce; full damage to front target and reduced to the rest behind. But in the ability preview, she is targeting the 3rd minion in the line and is doing full damage to that one, and reduced damage to the minion that's at the front. So is it the tooltip that's confusing, or is the interaction an oversight? I'm not trying to say it SHOULDN'T be the way it is in the preview clip, just that the tooltip would be kind of wrong in that case and should specify it does full damage to your target and reduced to anything else hit regardless of how they line up.

EDIT: Thanks to Penta Ace, I remembered to check the PBE tooltip for Xayah's passive and it is more clear and does line up with how the ability actually works. So false alarm I guess.