Euw Vision Bug

I joined a ranked game and everything was working fine in the lobby. However once the game started I suffered a vision glitch. I couldnt see anyones health or mana and the tab scoreboard was empty except for the top line which was squashed with everyones names. I tried exiting league which didnt work, I had to restart my pc and eventually when I did reconnect we were losing heavy. I also received no loot at the end because of my 'afk' and lost my silver 1 Promos, nice one riot!