Steps to repro: 1. start PrusaSlicer 2. add a box -> watch the object list: only one item is shown in the list 3. switch to preview -> the item in the object list gets a child
Steps to repro: 1. start PrusaSlicer 2. add a box -> watch the object list: only one item is shown in the list 3. switch to preview -> the item in the object list gets a child