When a mesh has been divided into multiple pieces seams can appear after applying morph targets. The blend shapes appear work as expected if the mesh is kept whole.
Result: The seams in the split mesh become more apparent the more extreme the changes in the morph target
Expected: The Mesh would render in the same manner as the mesh that has not been split
There's no existing public thread on this issue, so head over toAnswerHub just mention UE-72617 in the post.