I've continued the game and I'm now on mai 1917. Austro-hungarian Empire have signed a reddition, giving an economic support to the entente last turn. But now I'm on military phase and after 15 minutes I still have the message "politic AI operating". I've paused the AI, gived orders and saved, when I quit pause, politic AI operates again.
I join the save to this message (save and map file are in the same zip). I wonder if it's a bug or a very long time AI running due to the Austro-hungarian peace (but how many time?)