Camera Position Node in Light Function Materials does not function once applied to a light

In the material editor, the preview will change with the camera position.
Similar to [Link Removed] though the light will still emit when applied.

Investigating Regression info

1. Create a Light Function material
2. Add a Camera Position node and plug it into Emissive Color
3. Place any light source into the scene
4. In the Details Panel, apply the light function material
   Actual Result:
   Light is emited, but does not change color with camera movement
   Expected Result:
   Light color changes as you move the camera around