Inventor Assembly imports incomplete or missing geometry

It seems that UE4 has a problem with importing Inventor Assemblies and Subassemblies. Files are either the wrong orientation or missing their geometry completely.

This was reported and tested in 4.24.3 (CL-11590370). this was reproduced in 4.25 (CL-13144385) and Main 4.26 (CL-13501559)

1. Download and extract the attached file and the Inventor2019_Project.zip within it
2. Open the UE4 Editor and create a Blank Datasmith enabled project
3. Import the file “2020-A0105.iam” via Datasmith

Results: Parts are not imported correctly. No error message, just creates a dummy actor and no geometry

Expected: The result in Unreal Engine is the same an shown in Inventor 2019 Pro

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