The title explains it all. I completed the game, started a second play through, went to go hop back onto my main, it was bugging out, chief not spawning camera spazzing so i exited and reloaded the save to see that it reset me back to 0 minutes 0 seconds played on the first mission. Really annoying as i spent 17 hours on my first save.
A number of reports of this on here - search for the ‘Save file not loading - corrupted save file’ thread.
Don’t forget to head over to the Halo Support site and submit a ticket
Submitted a ticket 30 hours ago no response, its so frustrating. Thank god it wasn’t my legendary play through. Still 17 hours of hard work gone