Ahri's E(Charm) Bug

So today I was playing Malphite in a ranked game and when I tried to use his R(Unstopable Force) Ahri's E(Charm) when it landed on me stop my R midway cast and I thought this bug was fixed a couple patches back. Steps to recreate the bug:

1. Have 1 person Pick Ahri and Malphite on the other team.
2. Farm up till Malphite hits level 6 to level up his R
3. When Malphite uses his R have the Ahri player use Ahri's E while Malphite uses his R.