[GAME LOADING] Game Loading Error

I just had a solo ranked match where I encountered this bug. I queued up, selected my champion, and loaded the game--everything was fine until we were in the game. I realized that champions' health bars became dark green and a lot of things (health and mana bars above champions' heads, 8 other players on the leaderboard, my FPS and ping stats, etc.) disappeared. After I left the game and reloaded, everything went back to normal. This is the first time I have ever had this problem.