UPD: affected version 4.26 so regression for 4.27 is no
Licensee report, their repro is here -> [Link Removed]
Open in 4.27, open the render_sequence sequence and hit play.
Fly the camera close to the hair on the head; individual strands will show aliasing in the scene.
There's no existing public thread on this issue, so head over to Questions & Answers just mention UE-117760 in the post.