Bloom artifact showing in splitscreen settings

There is a bloom artifact at the top of the bottom player's screen.

1. Open UE4 Editor (any project)
2. Create a new material with base color (r 4.04, g .43 , b 1.81 )
3. Add emissive color (r 1.81 , g 81.12 , b 0.0 )
4. With material selected, drag BSP into level
5. In level blueprint, add "Event Begin Play" node and "Create Player" node.
6. Click PIE button