Cities on another continents are acting weird with railroad production bonus. I will try explain as best as i can:
first continent: City1(harbor)-----Capital=====City2(harbor) City 3(harbor)
City 4(harbor)
second continent: City 4(harbor)----City5(harbor)--------City6(harbor)
I started like this. Only one of the city from second continent got the railroad bonus (rrb), so i tried to fix this. Sold harbor from 3rd city only made things more weird The rrb 'jumped' from one city to another (on second continent). When i sold harbor in 1st and 4th city, the rrb appeared 4,5,6 city(nice) Buying harbor again in 4th city let the rrb appeared in 3rd city(without harbor!) then i bought harbor again in first city, BUT cut the road- rrb from 4,5 cities was gone (only 6 had), still rrb in 3rd city(still without harbor).
No mods, latest patch
first continent: City1(harbor)-----Capital=====City2(harbor) City 3(harbor)
City 4(harbor)
second continent: City 4(harbor)----City5(harbor)--------City6(harbor)
I started like this. Only one of the city from second continent got the railroad bonus (rrb), so i tried to fix this. Sold harbor from 3rd city only made things more weird The rrb 'jumped' from one city to another (on second continent). When i sold harbor in 1st and 4th city, the rrb appeared 4,5,6 city(nice) Buying harbor again in 4th city let the rrb appeared in 3rd city(without harbor!) then i bought harbor again in first city, BUT cut the road- rrb from 4,5 cities was gone (only 6 had), still rrb in 3rd city(still without harbor).
No mods, latest patch