Colored Lights On Edge Of Screen In Cascade Preview Window

While working in cascade (also in editor) with particles or stronger emissive values, glowing lights will appear at the edge of the screen.

Note
With bugs like this they seem to be tied to Radeon Cards (RX 480) in this case.

1. Open blank project
2. Work with particles with varying emissive values

RESULT
Colored lights will eventually appear on edge of screen

EXPECTED
No colored lights

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