I had this strange issue with some resources in civ 5. This only happens very rarely but when it does, it pissed me off.
So i had 3 aluminium on a hill, but it has already a mine built prior to my discovery of 'electricity'. So, i m supposed to have 3 aluminium, but on my screen it says 0 aluminium.
Also in another game sometime ago, i allied with a city state who also has a mine built on a hill. Then upon discovering coal, that mine has 6 coal, but i didnt receive any coal at all for the next few turns or so.
Screen:
So i had 3 aluminium on a hill, but it has already a mine built prior to my discovery of 'electricity'. So, i m supposed to have 3 aluminium, but on my screen it says 0 aluminium.
Also in another game sometime ago, i allied with a city state who also has a mine built on a hill. Then upon discovering coal, that mine has 6 coal, but i didnt receive any coal at all for the next few turns or so.
Screen:
Spoiler :