Hi there,
I’m experiencing the same problem!
To repruduce its enough to
take a default cube and
make it move in “Tick” e.g. DeltaSeconds * 500 in x-direction
If you place the character standing on the moving box
and look at the box in the correct angel, you will see the same artefacts.
(Look at the box, so only the edge of the box is visible on screen, works well to see them).
I really hope to get a solution for this! The only solution right now is, to turn of Motion Blur…