Rook f-A hitbox bug

So I noticed Rooks f-A has an invisible hitbox behind him when he performs the attack. I noticed after I somehow caught a Setsuki from behind when she had teleported behind me for her crossup shenanigans. Another time I hit a Geiger when he was trying to escape from the corner with his time stop.

I don’t think the hitbox is huge, these instances happened when the other player appeared right next to rook mid-animation.

game version 0.11591