(Playing on Windows 10)
Once I click on the game window, I can't click out, meaning I can't use any other app on my PC. Alt+Tab doesn't work. The only temporal fix is Alt+Tab+Delete, but the issue persists when I put the game back on. It doesn't matter if I'm using Full Screen or Windowed settings.
I also can't use the Snipping Tool short cut (Win+Shift+S) when playing to make a screenshot.