For the time being, the Harvesting update has been rolled back to the old harvesting system.
This is because the interface was regularly buggy for certain tablets and android devices, where the internal resolution was messing with some numbers behind the scene, causing it to either be incredibly small and hard to see, or the bar would be in the entirely wrong place- sometimes not even showing up.
Don't worry, it'll be back. It might be a few weeks though, since I've come to the conclusion that the GUI essentially needs to be rewritten from the ground up using a different method for displaying the information. The side benefit of this is that it'll be much easier to see, since it'll be a much larger display this time around.