Duplicating a stationary light and assigning one of them to Use Area Shadows for Stationary Light turns the others off after build

If you have duplicated a light a few times, and set one of those to Use Area Shadows for stationary Light, and then build the other two lights turn off.

1. Create a New Project
2. Open a new level
3. Delete the Source Light, Sky Light, and Sky Sphere
4. Add a Point Light to the scene
5. Alt and Drag to create a couple more lights to influence different parts of the floor
6. Under the Details panel of one of the lights, navigate to Lightmass
7. Check on Use Area Shadows for Stationary Lighting
8. Build

Expected : All lights influencing scene
Result : The lights currently not using Area Shadow for Stationary Lighting are casting no light