The first time, the client didn't allow me to pick a champion during my B1 to S5 promos.
Now this time. I was just sitting in champ select, typing into chat doing nothing. And without any warning my client just closed. On my series to S3
Thanks Rito, you little bastards.
I know how you feel dude..
It happens to me too and it's a pain in the butt because your character legit stands still until you reconnect back into the game or sometimes it does walk back to base.
Like I just hate the fact that i have bad connection and my fps used to be like around 100-120 now its like 50-70 after 7.5 patch.
My client legit closes right as i disconnect and reconnect after a bit and i click the store, my client legit just crashes as if i left the game..
I think the new patch brought my fps down because I was able to use high settings but now i'm stuck with low settings that is supposed to bring my fps up to like 120-140 but no it's at 50-70
That's using the legacy client while I use the alpha client i legit get a frozen screen which i have to restart my computer which gave me low pri que 
Riot please fix, please
IT'S TILTING ME AND I'M JUST MAINLY PLAYING NORMALS RIGHT NOW
