I have to say since 1.7 I have very little freeze, but yesterday I experienced 3 of them in a very short time. I also noticed very bad performance (lag). It was a drastic change from how the game usually perform for me.

Might sound stupid but I did realise that the room was very hot because I forgot to turn on the air conditioner. Turned it on, turn off the xbox to let it cool down for an hour, reloaded my game and voilà, all of a sudden I had a great performance.

Are you a wizard?