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
There's no existing public thread on this issue, so head over toAnswerHub just mention UE-55406 in the post.