Due to hearing about this issue and having seen this issue, I feel as though it is important to put this here.

The game seems to have a problem when saving after beating a night, but not after finding a hidden tape.

In theory, beating the nights then finding a tape will save all of the data just fine, but beating a night and not finding a tape may for whatever reason not save the data properly. There may be an issue with the way the save is being executed when beating a night, making it not work properly.

I have tested the game on three different computers, two saved the game properly, and my new laptop doesn’t seem to save the nights, but does save the tapes.

Keep in mind that so far it appears very few are having this issue, so if everything’s okay and saving right, then don’t worry about this at all.