LayerSlider Not Starting

When I update and save a layerslider page and go to my WP page. It rarely works. I clean out the cache and go to preview. Sometimes it works but most of the time I see only the background image. It’s very frustrating because sometimes the slider works, then when I try the same page again (without any changes) it doesn’t work.

On the rare occasion that the slider works, it doesn’t show one of the images. It shows the text ok but not the image.

I tried a sequence where I clean out the cache, then update, then preview but it still rarely works.