If a mesh has 'Morpher' modifier on it (even disabled) normals won't be imported, the same meshes imported normals correctly once the morpher component is deleted.
Found in 4.22 CL# 7053642, 4.23 CL# 8386587, and 4.24 CL# 8748719
The same mesh without a morpher imports normals as expected. While with a morpher it does not.
Normals to be imported correctly
There's no existing public thread on this issue, so head over toAnswerHub just mention UE-80572 in the post.