The discription in the "Royal Library says "The commercial appeal of a town depends on its commerce, but also, to a lesser, on the commerce of the neighboring provinces as well."
But how does an Island count its neighboring provinces? If its counted via "lines" on the Global map(found no other purpose) than its nearly impossible to compete with Inland provinces. I think there might be an Issue there in terms of balancing for Nations with Island in the Mediterrean.
Is this bug reproduceable? - Of course!
How serious is this issue? - minor
Game mode - Singleplayer Sicily campaign(1110) with peasant rush minor Victory
Steps to reproduce this bug - included Savefile
Version number - Build: 13667 2023.06.26 13:32
campaign.def
political_data.def
radio.txt
savegame.txt
unique_strings.csv
world.txt