Client won't log back in

Hi,

I was playing a ranked match and everything was fine. Suddenly, my game froze and "Attempting to Reconnect" popped up.

I exited the game and tried relaunching from client but it failed and I had to relaunch client. Client wouldn't load up and said there was an issue logging me in and kept saying to restart client. I had to restart computer before I got back in game.

Any idea why it disconnected me in the first place? My internet was fine, I could use it fine on browser and phone.

(Also I got a leaver even tho I came back to help win T.T)

Thank you!