Download the licensee repro from here - [Link Removed]
Open the 4.27 version of the repro in the 4.27 editor.
Open the level Map_ParticlesDOF.
Optionally open the level sequence.
Run PIE. The artefacts on the floating cubes should be visible (see licensee question for reference image)
There's no existing public thread on this issue, so head over to AnswerHub just mention UE-132033 in the post.