Black borders visible when changing the screen percentage in VR mode (VR editor) to more than 100

The black borders for the stereoscopic view are visible when increasing the screen percentage while in VR mode (VR Editor)

1. Make sure Vive is hooked up and turned on
2. Open blank project
3. Enter VR mode (VR Editor)
4. Set the screen percentage to 150 (Using the console command r.ScreenPercentage 150)

Result: The black borders for the stereoscopic view are visible
Expected: The black borders would not be shown when the screen percentage is changed to 150