In Game completely blacked out screen

Afternoon, Came back to playing league after a little break. Come to notice when i entered my first game to play, in game it was completely blacked out and couldnt see anything. I was able to play after some of my teammates saying to change the resolution to different option and then switching it back to my normal. I dont know if you guys have got any tickets about this, i was hoping this is just a bug with the new patch that came out for preseason.