This is a regression, worked fine in Version: 4.19.2-4033788
Found in Version: 4.20.1-4233996+++UE4+Release-4.20
Import .Step file attached in Unreal 4.20.1
(file contains block instances)
Instances are imported and visible in the viewer, not duplicated in the geometries folder.
Instances are not imported
There's no existing public thread on this issue, so head over toAnswerHub just mention UE-62622 in the post.