Download the licensee repro from here - [Link Removed]
Open in editor, the default level "cinematic" will be the default map
Hit play for PIE
There is motion blur on the car (easiest to see if you swing the character to one side and look at the tires).
All motion blur disappears.
There's no existing public thread on this issue, so head over to Questions & Answers just mention UE-116948 in the post.