Smoothing groups are missing when importing FBX file into UE 4.19.x / 4.20.x

Has anyone experienced the following issue - FBX file with skeletal mesh with smoothing groups imports into UE4 without smoothing groups (yet, in Autodesk FBX Converter smoothing groups are clearly present) ?

I don’t recall having this issue before, but I didn’t work with skeletal meshes to much in the past.

Thanks beforehand

I have the same issue in 4.21. Importing an .fbx file, I get an error message saying no smoothing group present. The imported asset looks low poly in UE4 although the mesh is detailed. When i import the same .fbx file in Autodesk fbx viewer, asset looks good and smooth.

in UE4:

in Autodesk online viewer: