Sadly I do not have a recording yet. For the next game I wil create one. But basically from one second to another the screen got black for not longer than a second and then you are on the desktop and the game is already closed (no icon in the taskbar anymore).
Hint: In the last game (3vs3) one of my teammates and me crashed to desktop in the same time. It was exacly the same second. Maybe this helps you in further investigations. My idea was something related to lobby creating / game hosting / server communication.