Able to find a new game after leaving a game that was in progress

I was in a normals draft match for about 8 minutes and as I was walking to lane I started attempting to reconnect. It was taking longer than usual so I decided to leave the game and join back. I left but in the client I wasn't given the reconnect button but instead just the regular client and was even able to create a lobby and search for a new game even though I hadn't finished my last match. Not really sure what caused it and this is the first time I've ever had this issue before.