Katarina [E] Shunpo bug [gameplay]

sometimes when u play katarina and use E on someone u will find yourself casting your W without clicking it, i've found how to make this bug happens and i hope that u can fix it because its annoying

u can make it happen by killing a minion/monster with your E (make sure that your E kills the minion like a oneshot) and press your W. u will find that it didn't cast the W, how ever your next E on a Champion,minion or a monster will cast the W for you without clicking it. it works 95% of the time for me and its easy to make it happen. It cant be explained by a screenshot and i don't have any recording app.

P.S: you can make this move with R too but u can't do it with the Q and u can do the same move with both W and R so when u E someone the W and R will cast right away as if you are scripting and its actually not that good since i can't do some of the chasing combos because of the minion thing.