Stuck on Loading Screen?

So a little while ago I started up a game of flex queue and everything went through the usual process, except the loading screen was taking an unusually long time to finish. After about 2-3 minutes I killed League from the Task Manager and the client loaded the post-game screen instead of the normal "Reconnect" button. I thought, "uh oh - League dun goof'd again." But BOY was I wrong! I checked my match history and the game pegged ME as a "Leaver (Remake)" for that game that never loaded for me. What?! What is going on? I don't want this getting me reported and inevitably suspended due to Riot's buggy patches.