Guardians of the Galaxy Playset - Can't save Game?

Im having a strange problem. I got the Guardians playset but everytime i try to save the game, it says game saved, but it doesnt seem to actually do it. Under the Load menu for it, it just says "No Saved Games Found" I already lost almost 2 hours of progress and all the collectibles i found. I tried just starting a new game, because i didnt have much of a choice, and thats how i discovered this.

What could cause this? Im on PS4 2.0