Game mode: Singleplayer
On two seperate occasions I have lost several hours of progress in the game. I quit the game and then when I come back to play at another time it is like the past hours played never happened.
The first time this happened I made sure to move the game to the internal HDD and always remember to manually upload my save after quitting the game, sadly this did not help because it happened again.
I am using a normal PS4 and playing the digital version.