Updating an ArchiCAD model to Twinmotion via the direct link - stuff not deleting

I am working with a reasonably large ArchiCAD model. It links to Twinmotion fine. If I add stuff that updates fine BUT… when I delete or move anything the object or element I have moved or deleted is still in the Twinmotion file in its original position along with a second one in the new position for that element.

I have put quite a few hours into adding asset and the like. Is this normal? Am I expected to start from scratch event time the model is updated?

In the world view on the left hand side on the right click for the model there are commands like “unlink” and “delete” etc ,none seem to work for the linked ArchiCAD model. I was hoping I could delete the model and reimport it again. That would be OK if it worked.

Has anyone else come across this and maybe found a way of getting updating to work properly?

Better to post this in the twin motion forum.