IFC object orientation change when exporting

 

 

Hi all,

I have a strange problem with a imported IFC model from a customer.

Scenario: 
1. Importing IFC from supplier -> 2. adding some new objects in 3DX -> 3. exporting new IFC and sending back to supplier.

When exporting the orientation of a few objects is flipped by some reason. This is objects that I haven't edited in 3DX and it happens even if I don't do any changes to the IFC, just import/export (see attached pictures). 

Is this a known bug? If so, do anyone know a work-around for this?

For now, I have to reorient and place the affected objects wrong inside 3DX to make the export come out correct.