All Campaign data lost after update?

So went to replay a certain mission with skulls enabled tonight and it seems my Campaign has been wiped? How can a patch wipe save data? Happened after the Johnson patch.

Anyone else had this issue and how can I resolve it.

Have a read of the last patch note.

This is a common issue it has happened to me. As I’m aware there is no way to resolve it but 343 are investigating it. If you could go to the link provided and answer some questions from Ske7ch it will help them narrow it down. The link is here.

Thanks, I have filled that in.