We heard that players who were on other Farms have been transported to Home Farm when they return to the game. This appears to happen with or without a Whoa Farmer notice, and have caused some to get stuck due to the Home Farm's long load time.
We sincerely apologize for the experience. We would like to reassure everyone that the FarmVille team has been looking into this, and is committed to find a resolution at the soonest possible time.
Meanwhile, players can immediately travel to Sunflower Meadows from the Home Farm by clicking on the big gray circle to the left of the game board.