Game has never been able to load a save while a game is running. Issue has been present for at least 2 years. Experienced issue on both Windows 10 and Linux. Kinda hard to believe such a fundamental issue has been around this long.
- Start the game
- Load a save file
- Play for like an hour or something (or possibly less than that. I never play for fewer than 12 hours per sitting)
- Open the menu and load a game
Result: Infinite loading screen.
A relatively complex base might be also necessary to trigger the issue. I'm usually loading a lot more around cycle 700 where going back 2 days and not doing something stupid is significantly more efficient than trying to undo the stupid thing I did 2 days ago.