When importing into archicad, the entire model is mirrored. (original model was exported into speckle from revit). Note - archicad objects (of which a ‘speckle object’ is a subclass) have a ‘mirror object’ checkbox. however toggling this results in each object being mirrored around its own internal base point, not the project base point, so selecting all and checking this box scrambles the model.
a workaround is to select all the imported objects and manually mirror, so not a critical bug, but it is annoying.