idk whats wrong but its annoying

i just got a leave on a ranked game (which happened to be one of my promo games for silver) because i "lost conection" to the league of legends server. i then tried to close league (which didnt work) so i then went to task manager and ended task. i then tried to relog several times, and that didnt work. so i opend up task manager again ended task, tried running league as admin. got in game then could right click 1 time i would move to location then "dc" so i opend up a ping tester and tried to move in league again. i clicked 1 time dced then i look at my p[ing test and saw i had internet conection the whole time. i know you cant change my leave but i would appricate it if this wouldnt happen again. ps not to happy about losing promos because of this fix it asap! (its not the first time it has happened and im tired of it