Resetting problem

I’ve created a mobile platform game. Everything works fine. But it seems like after a while of playing and saving my progress if I leave the game and come backs an hour or so when I open the app the game resets itself and all progress is lost. Is this a script issue in my save and load script or is it a memory issue on my phone. I’m using PlayerPrefs to save and load.

Show the scripts. I’ve got an app out right now that saves thousands of values to PlayerPrefs with no issue.