CullDistanceVolumes don't update correctly

Licensee provided repro, verified broken:

To replicate:

1. Create an empty project, create a default scene.
2. Place a CullDistanceVolume in the scene. To see clearly what's wrong, update it's values to cull all objects within at the same distance (E.g 1 Cull Distance Array Element Size = 100, CD = 500).
3. Place a Cube into the CullDistanceVolume. Play and move the camera around to see it's correctly culled.
4. Change the mobility of the cube to Stationary or Movable. It's still culled (even though it shouldn't be: CullDistanceVolume.cpp line 61).
5. Move the cube out of the volume. It's still culled.
6. Duplicate the cube, move it anywhere you want. Both cubes are now culled even though none of them is in the volume.