Report Bug [CRASH]

At the end of ARAM games (not sure if just ARAM, or if it happens to normal as well), when one clicks on the "!" to report (I was about to report AFKs), this happens: client appears to be "whitened".

Please see link for picture.

Nothing works, one can still see the chat, but nothing is clickable. Only option is to Alt+4.

This has happened multiple times since the last patch update.