Board Thread:Questions and Answers/@comment-24102119-20131122051115/@comment-5927117-20131122201527

From time to time the game saves it's progress. If that fails usually because you don't have an Internet connection or a poor one eg. beause of bad coverage it reverts to the latest saved version. So

a) make sure you have good connection

b) make sure the game updates. Visiting a neighbour will do the trick or traveling to the Arctic Isles. Just  harvesting some crops is not enough.