Ive noticed this bug happening the most after you get a lot of scanning done and then after you save and get off the game save goes bad i feel its to the point if you dont want to loose your save you have to leave your system on
So i am experiencing this bug as well i had just got back from going theough the arua last night and saved and whent to bed woke up this morning and it wont load i do know i did a lot of scanning yesterday before i saved and got off