Lol freezing

Hello I came to speak of a bug that is happening with several players (at least in the Brazilian community) that is affecting me, my lol freezes the screen between the 3 minutes of start and sometimes between 6 and 8 minutes ... Yesterday I was banned by afk because of this bug today I was banned 2 more times I would like to know how I can solve this and if it is possible to remove the leave buster since it was due to a bug. [sg-shisa]

ops: Sorry for any English error, I do not speak English I'm using Google Translate