It happened to me 4 or 5 times yesterday. Some turns, after its processement is finished, force the game to jump directly to the menu screen.
From the menu, if I click "resume", after a few seconds the game starts again, but nothing happened (the turn was not actually processed). Then, I can progress a few turns until it happens again.
It is not predictable, I can't precise when it happens. It's a bit problematic. It means that sometimes I need to process the turns twice !
I am using the latest quickfix (the one with the F6 screen broken).