I have a strange problem. LOL will automatically buffer each animation in a match and each time a new animation is done first time in a match, It takes like 0.5 secs during which my screen is stuck and I don't know what's going on.
If a teamfight breaks out with too many new animations from mine and enemy team, I usually get free deaths :P
It didn't use to buffer before and my PC could load stuff properly even then and not hang like this. It started this buffer thing like 8 patches ago.