Bug Life TL;DR: black screen in champselect

rito pls halp. Maybe one in every fifty games I get into champion select the client just turns black but I still hear the music. If it's norms then after 60 seconds I get thrown back to lobby with 5 minutes penalty / low priority queue. If it's ranked, I can only wait 60 seconds and watch with sorrow and dread as the music ticks down and I'm left alone in the abyss of darkness awaiting the inevitable beckoning horror while I beg on my knees praying to the league gods to lay mercy upon my soul. I've lost promos because of this and would like rito to resolve this as soon as possible pls. BibleThump