Can we please fix Lee Sin's ult's delay?

I'm not sure if this is intentional, but Lee Sin's ult seems to 'stun' an enemy for 0.25s-0.5s right before he kicks them, making flashes and even some disables impossible against him. Just now I was playing Thresh, hooked the enemy Lee Sin and still got kicked away even though he was in my Death Sentence's stun.

Seems to happen a lot. Lee Sin is onto you, you try to flash away or CC him but nothing happens/he ignores it and he kicks you no matter what. It's making flashing away from 'insec' plays rather very difficult.

Ritoplsfix

Silven