I'm the victim of a particularly nasty save bug in the Xbox One version of The Witcher 3: Wild Hunt. My first encounter with it resulted in over two hours of progress disappearing into the ether. My second dance with it stole away another hour of questing. My third occurrence came when I had a nice chunk of free time to game this morning. Once I saw it was happening again, I decided to play Puzzles & Dragons / Super Mario Edition instead.