It seems to occur for every war, particulary for cities (Outposts seem to be OK).

War resolution screen (which seems to show 5 cities for some reason): https://i.gyazo.com/e55ba6b2530190e7774b976b5eb14b6d.jpg

Furud (supposed to be San Lorenzo)

Alioth (which is an outpost I created???)

Alcor

Baekdu

Dubhe (supposed to be Pataliputra)

The actual 4 cities of the Mauryans: https://gyazo.com/42c1469e27eec36d29d9aae52c7f221d

1. San Lorenzo (with 2 outposts: Baekdu and Alcor)

2. Pataliputra