Kicked Out of Loading Screen With AFK Message

I got into a game, and all was going smoothly until the loading screen. I got to 100%, but it wasn't loading me into the game. I know it can take a while sometimes so I wasn't too worried and was just waiting. The loading screen closed and I expected to be in game, but instead it showed the client with the message "You are ineligible to earn loot due to leaving or AFK behaviors." in the chat. I don't think I dced since I've never dced before, so I'm not really sure what's up. There was another person or two in the chat when I first saw it so I was hoping one of them would have an answer. Has this happened to anyone else?