patch 7.10 - gragas body slame (E) bug

I noticed in many games that gragas e can hit a lot further then the range indicator says i checked with the new practice tool how much range does his e really has and i discoverd that its more than 50% bigger then the range indicator says furthermore gragas can hit targets for like half a second after the dash was over and he already started walking and using other spells. plss adress this issue ive been hit by his e way too many times when it was obv that i was out of range and it cost me kills,deaths and rarly even games. i encourge everyone to try it in the practice tool and see for urself if u dont belive me.