Saved this game just when Brown attacked the city of Nok. There is an army present to defend it, as well as some city militia.
When trying to pick a manual fight, you instantly lose this city. There is no troop placement or anything, fight is immediately over.
Unsure what is causing this. Happens every time I load the save game.
This is the save: Byzantines Turn 98.ctr


(Strangely, when picking the auto resolve, you will win it.)

Edit: exactly the same thing happens a couple of turns later. Same city, different attacking army. Click deploy troops and you'll lose.
Byzantines Turn 104.ctr