This is a common issue. The slidehsow is controlled by Weebly. When you click on the tab, it than load the slideshow. However, the loading of the slideshow is delay so it appears it is not there. When a slideshow is inserted into a dd tab, it requires 2-4 seconds before it can load. Since we cannot control how the slidehsow load for it is a Weebly element, we cannot increase the speed of the slideshow loading.