Random Disconnects While in the Client and Post-Game Lobby Closing Itself [CLIENT]

While I am in the League client, I will occasionally disconnect, making Team Builder unusable and sometimes making me dodge from lobbies due to crashing. If I manage to get into a game, there are no connection issues whatsoever. I have also had the client crash after a game so it can't load the post-game lobby. I have tried repairing the client, and it did not fix it. If you know how to fix it, an explanation would be much appreciated. Thanks!