DAM BUG COST ME MY SERIES

yea so just got a bug that cost me my dam series was 2-2 then go for my final match and click on masteries and changiging a few thing on it then I close it to pick my champ since its my turn then it wont close all it dose it a dam white space blocking me from picking a champ this is so fking annoying and now knowing how it gonna be ima just end up on a losing streck. Thank League of legend and your stupid bugs out of random