(XB1)Save load failed about 6 hours into the game

I’m playing a hardcore play through with all of the debuffs. And shortly after “the good thief” quest, i was able to save by sleeping but all other saves afterwards are corrupted. I know I will probably have to restart but I just want to know how to avoid this from happening again.

Are u using newest mods?

I have No mods installed since I’m on Xbox one. And I’m pretty sure I’m on the latest version of the game. I do have all of the dlc though if that would have something to do with it.