Sudden Game Crash

This happened in one of my summoner rift ranked games yesterday and one of my poro king aram games earlier today. The game suddenly closed and took me to the lobby version of the client. No bug splat report. No messages or warnings or anything of the sort. It's as if the client just pressed alt f4. I was able to instantly attempt to reconnect back to the game, so I was only gone for 15-20 seconds. But still, that's not something I want to play games with right now. Please resolve this issue.

I believe it may have something to do with Ahri, if anything? In both of the games, being in the same lane against an ahri was the only common factor. In poro king I was playing gnar with the snowday skin. In summoners rift I was playing swain with the dragon slayer skin.