Why Does Getting More Essence of Blue or Red Kayn Lock Me Out of A Powerspike For 4 Minutes?

So if I am close to getting blue kayn, and I want red kayn, I have to intentionally not wack any ranged champions until I get red kayn or I fuck myself over? Why can't it just not have a lockout and I can go fill the other bar up?
Report as:
Offensive Spam Harassment Incorrect Board