Hardcore Mode save impossible

As the title says, when trying to start a game on hardcore mode it doesn’t save the game. My first play session was well over 5 hours. I picked the “save and exit” option in the menu, ran the game the next day and the save slot was empty.

I tested today on normal mode and the save slots work properly.

EDIT: I see now that the version I’m using is way outdated, sorry about that! This bug has been resolved already in an updated version.