I have a gallery object on a page with 4 images.  I am using classic slideshow with no thumbnails or buttons visible and autoplay is on.  I have cropped all the images to a standard 16:9 ratio.  I also added a heading to the object itself.  When previewed although the images are cropped there is white space above the image and below the heading. I get this effect no matter how many rows or columns the object is.

When I add another image to the list and without cropping the image, the image previews correctly - that is, it is positioned directly under the heading without white space but the other images are still have white space. 

Is this the normal behaviour of the object?