You make it sound like this is unfixable. It's not a huge problem, but sleep mode can't be such a poorly implemented feature that it crashes programs randomly.

There's little I can say about the circumstances of this. This is the steam version of the game, and only happens when actually in a game, not on the main menu (it still happens if in the pause menu). It also only happens when in fullscreen. The game is not modded. I'm running the game on a laptop (...