[U8] IFC Export - Spatial mapping

Hi All,

I'm facing a rather surprising issue. When exporting a "container" IFC file with a multiple level reference structure I have set-up the spatial mapping to arrange which of the references should be exported under certain buildings and floors. Then I hit "Save" and close the dialog. I export the IFC file which results in a nice structured IFC file with all the correct building- and floor assignments.

However each time I do any changes to the floor manager (adding/changing a floor, building or reference plane) all of the spatial mapping is reset back to the default value (which is a single building). Is this supposed to happen? I don't like it anyway. I can imagine that when changing a certain building (or floor) that the spatial mapping of that specific building is being reset. But even then the software should give an error message ... Usually you'd have to setup the building/floor structure 1 time at the beginning of the project and don't change it. But I think reference planes are a very legitimate thing to add during the course of a project.

I can only hope this can be solved by some configuration variable? If not, maybe an enhancement request should be filed?