Client crashing right as loading screen is supposed to start?

I have a BIG problem.

I've been playing this game since season 3, and I have had very few technical problems, at all. Just recently, yesterday and today, RIGHT as loading screen is about to start I get a bugsplat, and the client says it needs to repair itself, so it starts repairing and I don't even get an option to reconnect! By the time it finishes my team has already remade.

I don't get it..I haven't had a bugsplat in AGES, but now I'm getting one that has happened more than once, AND if this somehow keeps up I'll get banned from leaverbuster even though its not my fault to begin with.

I've been using the same pc setup since preseason 5, nothing has changed. Why would I all of a sudden be getting bugsplats now? It makes no sense to me.

I can't afford to have this keep up, I dont want to risk a ban just because of an issue I dont even know about.

Also I want to point out I use a wired, and high speed internet connection, so my internet isnt an issue.

The new client since it came out has also had very little problems on my end, at least not big ones like this anyway.

If anybody knows how to help, or if anybody has been experiencing similar issues recently, let me know. This is a serious bug that could cost me my account if not fixed long enough. I have always been a kind and encouraging player, I couldn't take getting a temp, let alone a permaban..