We're excited to announce that we've fully migrated the Xbox Forums to their new home, here on the Microsoft Community forums!
As of today, going to forums.xbox.com will redirect you here to the Xbox area of the Community forums. We've moved all of your existing threads over so you can continue and start conversations with the new forums experience.
We sincerely appreciate the feedback you have provided over this transition and can't wait for you to check out the new Xbox Forums!
As said it was meant to of been patched but going by reports it is still happening on both systems. I have already lost my progress on both systems twice so am going to hang on a while longer till they patch it properly.
Did you play any multiplayer during the time you played the campaign? As I was only doing a level then playing lots of multiplayer then going back to do another level maybe a few days later. The save was fine until I got a crash during multiplayer then it
would wipe it.