title: Dropshadow in a a transparent .png not rendering correctly on iOS device
body: <p>I am using the following image as the image property for a UIImageView.  It is semitransparent with a semitransparent drop shadow.  When I display this view, it is rendered above a video with a white background.  The drop shadow is not visible.  When I take a screenshot from the device, the shadow shows up in the image.  It seems like something is going wrong when the image is drawn, or the contrast is off on the device.  The other interesting thing is that it looks fine on the simulator.  Any ideas on why this is happening?</p>
  
  <p><img src="https://i.imgur.com/aD5eu.png" alt="shadowed window"></p>
  
  <p>EDIT: I've tried cleaning the build.</p>