I had this happen to me, maybe the same thing ????
– its because I was creating blank slideshows … I didn’t have a gallery or album made yet, and i tried to create a slideshow with no gallery or album selected, and it gave me short code with only gallery ID and gallery title.
them I made a gallery – and tried a slideshow and same thing.. no code, and its because I was NOT selecting a gallery in the slideshow settings.
real easy mistake.
make a gallery – select it in the slideshow settings, then try pulling code.
Hope your issue is the same as mine, and easy like this.