Hey @loewchen, I saw those posts before, the issue here is slightly different. Here, we have an entity completely removed from the game, instead of just moved. The deleted underground is not added to the player's inventory. That is why I believe this is not a duplicate issue, although it is probably ...

What did you do?
Using Remove view, I dragged a Fast Conveyor Belt lane over a lane balancer I had previously built.

What happened?
The Smart-dragging feature placed as a blueprint an Underground Fast Belt entry point as expected, but when it intersected with a perpendicular Underground ...