Since December I started have saved data issues like many others. For me it started with Phoenix Logs being locked even though I had unlocked them. (I had almost all of them) Then I noticed that optional and bonus objectives showing incomplete even though I just completed them, still got the gold medal but it showed the objectives on the mission selection as incomplete. Then the cutscenes were getting locked. Eventually it got to the point were everything was locked. I never bothered to play until I heard of a fix or an update. So I January I did the update and somethings had returned. Two cutscenes are still locked as well as flood lore Phoenix logs.
Today I decided to play a couple of missions. I was offline when I wanted to play but when I went to missions menu everything was locked. I found this odd so I connected online and everything was back. Normally I play campaign and firefight offline so this is problem for me anyone know the cause and solution for this.