[CRASH] During loading screen, post-Champion select

Today on 2016-1-12, after 3 P.M. EST on the NA server, I started a Normal, Blind-Pick match. Everyone locked in and the timer ran out and we moved to the loading screen with the ten Champion portraits and loading percentages. I'd loaded with 100% and had something like 58 ping. It seemed to be taking a long time (which has happened before, the internet being what it is) but I finally realized the client had crashed because my ping wasn't changing at all (it's normally pretty stable so it took me a while to call it).

I Alt-Tab'd out and checked the Task Manager. No insane CPU or disk usage, so I checked the client again, but nothing changed. I finally just killed it in the Task Manager and another LoL process said the client had crashed and asked if I would like to rejoin. I clicked "Yes", "OK", or whatever was offered. The same freeze happened again, I could see the loading screen just fine (the ten character portraits, loading percentages, my ping, etc...) but it froze again.

This time I closed all four LoL processes, started League again, and got back into the game. People were around level 11 at that point, but my team was very understanding and we managed to pull out a win (and I'm happy with my KDA, cs, and gold--I even managed to hit level 18).

So that's the bug report, I'll call it point (1).

Point (2) is that after the match, out of fullscreen, I got a LeaverBuster warning and had to type "I Agree" to continue. I can imagine what the odds are of this (and please take the bug report seriously even if you ignore this), but the game client froze--even after I'd loaded 100% and had a good ping. There would be no reason for me to quit, even if I could ignore screwing over four other people. Is there any way to get the warning, points, or whatever is used internally removed?