[Mootools Bug] Some objects are imported with incorrect positions when the "Keep hierarchy" collapse mode is used

I could only replicate with the user's sketchup file. Exporting this file as fbx, and importing the fbx in KH doesn't have the issue.
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1 - Import attached sketchup file in Keep Hierarchy

2 - Import the same file in collapse all mode

3 - Inspect the 2 imports

Results: In KH mode some of the objects will be in incorrect position relative to one-another.

Expected result: All objects should be in a position that matches the collapse all import.