Screen flickers and becomes overly bright when adding a widget to the screen

When adding a widget (in this case a button) to the screen the right side and bottom of the screen begin to flicker and grow extremely bright. To make sure and reproduce the issue you will need to stare at the sun in the level.

1. Open the Third person sample project
2. Create a new widget blueprint
3. Open the new widget blueprint
4. Add a button to the designer graph
5. Save and compile
6. Open the level blueprint
7. Add the New Widget Blueprint to the screen
   Begin play > Create widget > Add to viewport
8. Click VR preview
9. Look up and towards the sun in the level
10. Notice that the screen begins to flicker and grow very bright