software used:
Allplan 2025 & Allplan 2024
How to replicate:
Select some items like walls or other object in a layer with steel columns in it.
move / scale / rotate / copy or mirror items
Reselect items again by double clicking right mouse button after completing
Watch as total random steel columns are in some cases also selected and having the next action also applied to them
result:
A drawing file with columns in random places without noticing it because it happened off screen.