Corrupted save on preview

I keep running into a bug where previewing the game will lead to a black preview screen, when exiting the preview the game will be unsavable, and corrupted. when trying to load autosave, does not work. game completely lost

This is extremely frustrating! fed up with this buggy broken software

This is the first time I have heard of this big and I have been using this game engine for about 2 years