When you fly a helicopter (from this mod: https://mods.factorio.com/mod/HelicopterRevival) over any building from Factorissimo, the helicopter and the character enter the space of this modification + become invisible.
The only way out of this situation is to land on an empty building and pick up a helicopter.
It is necessary that when flying over the entrance to the building in a helicopter, it does not enter the building space.
