Unable to color-invert bitmaps embedded in shapes

The following does not work:

  1. Create a shape
  2. Under FX, set Texture to Bitmap
  3. Set the Filter to Invert

The bitmap image appears to correctly invert in the KLWP app, but the image on the wallpaper does not actually invert. It displays, but it retains its original coloration.

I've included screenshots of the issue as a demonstration.