Leave Buster

HI Guys, so lately I have been having some serious issues with crashes. I have updated everything as suggested and I lowered my graphics in game to low on everything. However, the game still crashes and gives me bug splats. This never happens during a game but rather between the champion selection and loading screen. Is there any other suggestion? I don't feel its fair I gotta sit through this again as I just completed my last leave buster a few hours ago, and this genuinely isn't intentional or anything, I have changed nothing now and it is allowing me in game but the game crashed so this is not making sense to me.

Please help