OK, I have moved this thread to the iOS section of the forums, where it will make more sense.
We have never seen the problem you described, except when the game's internal timers are disrupted by changes in the device's system clock. This can happen inadvertently, such as when traveling across time zones or when Daylight Savings Time adjustments are made. The best way to prevent these types of problems is to make sure that you completely close the game prior to travel or DST adjustments, and leave it closed for the number of hours involved in the time adjustment.
Sometimes people do adjust their system clocks intentionally to speed up play, but we don't advise doing that, since it affects far more than just the games. Every application and system function will be affected by such time changes, including the file system and other system applications. For all of those reasons, we do not recommend changing your device's clock to speed up game play.
There are several ways to resolve the problem, depending upon the specific game and version you're playing:
- You could wait for some period of time to see if the game recovers on its own. This will usually happen when the actual time on your device "catches up" with the furthest date/time that occurred due to clock adjustments. Unfortunately, we can't predict how long you may have to wait, since it will depend upon how far into the future the clock was adjusted. Pausing the game while you wait for that to happen can make the wait easier.
- For mobile games, especially those that offer In-App Purchases (like VF2), we don't recommend deleting the game. Doing so will not only delete the app and all game progress, it will delete any In-App Purchases that might have made. Some of those are recoverable, but you should ask us for guidance before taking any action on your own to resolve this situation when playing a mobile version of our games.