Can't Reconect + client picking bug

when you play you cant reconect to the game...... so you are afk and then without your fault or because of bad behavior you get baned... you wait the ban and then you are ready to play .But when you are in champ select another bug occurs and you black out from the client .As you cannot pick a champion it sents you back to lobby.Then you have to wait again the 20 minutes!!! Its annoyiggggggggg!!!!! I dont have so much time to play. Please fix these bugs ........