My city Rome is besieged by the enemy. It has been holding out for a couple of turns for a while before it got attacked. Defending it is only a navy (gotten from an event) and no militia. Once I enter the battle framerate drops down to 10 or so and game gets stuck at "Waiting confirmation from the Greeks". It got attacked once proper and there were no issues as my land army got wiped out. However as the navy survived the siege continued and in this instance with navy only the bug occurs. Save files provided below (turn prior and said turn)



auto-save 1474.ctr

auto-save 1475.ctr

Doing the auto-resolve wins the even battle overwhelmingly and then crashes the game (Just before it does you can see the 3 naval units garrisoned in the landlocked city center