My wife told me of this experience last night.
She automates her workers and she sent a settler, troops and a worker to another part of her continent via sea transport to settle next to some gold, sheep and something else. So she gets there builds a city and the workers start working the tiles. The Gold gets mined the other tile gets completed and before working the sheep tile they decided to jump on a ship and head back to the motherland.
Keep an eye on your automated workers they dont exactly do what you expect them to.
She automates her workers and she sent a settler, troops and a worker to another part of her continent via sea transport to settle next to some gold, sheep and something else. So she gets there builds a city and the workers start working the tiles. The Gold gets mined the other tile gets completed and before working the sheep tile they decided to jump on a ship and head back to the motherland.
Keep an eye on your automated workers they dont exactly do what you expect them to.