Split screen causes rendering issues with lightshafts

There is an issue occurring where Split screen causes rendering issues with light shafts. This issue does not occur if you use the command " r.lightshaftquality 0" The issue no longer occurs. This issue does not appear to be a regression.

Versions Tested: Issue occurs on all versions tested
4.17.2 CL - 3658906
4.18.3 CL - 3832480
4.19p5 CL - 3898826
4.20.0 CL - 3879785

1. Create a new project (no template or starter content needed)
2. In the new level> Open the level blueprint > on event begin play add a create player node
3. Save the blueprint and close it
4. Add an exponential height fog to the scene
5. Enable the light source to have light shaft occlusion
6. PIE and rotate the player camera you can control 180 degrees
   Result: On the second player's screen the lighting has a visual error occur
   Expected Result: There is no visual error on the second player's screen