Repro:
- Create a new Blueprint class based on actor.
- Place an instance in the Viewport and select that instance in the World Outliner.
- Add a sphere and a cube and move them so they are both visible.
- Select the asset in the viewport and either ctrl-c then ctrl-v to copy and paste another instance of the BP class, or alt-drag the translation widget of the instance to create a copy.
Result:
The components of the copy lose their transform values.