Tested in //UE4/Release-4.27 CL#18319896
Ray Traced Translucency causes artifacts when rotating a Static Mesh in the 'Open World' level when moved far away from the center of the map. The Artifacts begins to appear roughly at the edge of the last World Partition Cells once the mesh is rotated.
DumpGPU will be added to the comments.
Ray Traced Translucency behaves as it does before the cube was moved or rotated.
Lines and Artifacts over the surface of the cube.
There's no existing public thread on this issue, so head over to Questions & Answers just mention UE-157005 in the post.