Performance and Crashing

Let's get the obviously fixable bug out of the way:Whenever I hit escape to get out of the options menu in-game my game will completely freeze before resuming a few seconds later. This does not occur in any other situation.

The next is the instability. Whenever i'm playing normals draft, the client will inexplicably crash at random times. Though it seems to happen most when i'm in queue with a friend.