miss fortune - double up bug

Type of bug : Gameplay summary of bug: miss fortune's double up second target bug server : KR, NA More details : double up bullet is disappear in 1st priorty case this is order of priority (second target) 1 : double up will first attempt to target champions marked by Impure Shots within a 40 cone -> whenever this case, double up bullet is disappear 2 : then it will attempt to target a minion/monster within a 20 cone 3 : then it will attempt to target a champion within a 20 cone 4 : then it will attempt to target a minion/monster within a 40 cone 5 : then it will attempt to target a champion within a 40 cone 6 : Finally it will attempt to target a neutral/enemy unit within a 90 cone i found this bug 4.15 and report KR riot but they said 'we summit to QA team' but it was 1 month ago. it happen til 4.17 i want to inform to NA Riot.. i'm sure it is critical bug to miss fortune please fix it this is video link : http://tvpot.daum.net/v/v13beJDfJiLii9A1iHVLlYY