Actually it happened right when I updated to FSD 3.0.. and no I haven't updated the MS dashboard recently. But my profile was corrupted only for my forza games,I lost all my save for forza horizon and forza 4, I had to delete manually my save files from these games unfortunately. Reading throught internet, I noticed that a lot of people have trouble with Forza save so it may only affect these games. Next time, i will move my profile to a USB stick to be safe.