When cloning a product, it will clone item with images and combinations. It does not close the assigned images per combination.
As example, lets say I have a shirt with 2 available colors and 3 sizes. So a black shirt in S, M, and L will have one image and the other color will have another.
When cloning, it doesn't save the assigned image per combination. This will help tremendously if this happened, especially when I have size S-5X and 13 available colors.