VSMs not rendering soft shadows on left eye in stereo rendering when more than one light is casting shadows

Left eye shadow dithering stops working at a certain distance away from the light.

To recreate this behavior with any project, follow those steps: 

1. Create an empty level
2. Add a static mesh and a backdrop mesh (cube)
3. Create two spotlights that will cast an overlapping shadow on the backdrop mesh (crank up the intensity)
4. Each spotlight should have a source Radius of 15 or more (the bigger the source radius, stronger is the artifact)
5. Open Project settings > Engine > Rendering > Shadow maps method > Virtual Shadow maps
6. Launch in Standalone game with Emulate Stereo turn ON
7. Get your camera closer from the overlap section of the shadow

Repro video: [Link Removed]

Repro steps: 

1. Download repro project: [Link Removed] 
2. Open the project in editor
3. Change Play Mode to Standalone Game
4. Change Play Settings > Advanced Settings > Emulate Stereo
   [Image Removed]
5. Validate that the shadows are correct (=soft)
6. Launch in Standalone Game 

Result: 

• Shadows are flickering on your first eye (Left)