Bug where Xayah can tower dive without taking turret aggro.

I don't know how often it happens, I just know that I used my ultimate to dodge a lux Q under tower and then tower dived her and killed her. I didn't take any turret shots and it just felt odd to me that I was literally under a turret killing an enemy champion and I didn't take any damage from the turret. I wasn't taking aggro before I used ulti.