Client stopped working [Client]

i joined a ranked que as i just won my prior game and now in promotions and when the que popped everything was in "off-placement" the "ranked 5v5" thats normally in ur top left corner was bottom left. Also everyones role dissapeared from my screen i tried minimizing and it went to a white rectangle, when tried to restore from that it wouldnt do anything just stayed there... i tried to ALT+TAB back into it and when i scrolled over the LOLCLIENT it then said LOLClient has stopped working then crashed...causing me a loss in my promotion (and -3 lp)

maybe the leaverbuster shouldnt count ur leave as a loss if determined that the client crashed?