Some sliders only show one static image

I have created 14 sliders. The first one, “Groceries” is intentionally static because it contains 45 slides. The next one, “Beer & Wine” with four images, is set to Autoplay but not does not do so either in the Dashboard preview nor on the page. All the rest are set to Autoplay and they work nicely, aside from the following two additional exceptions: The “Refrigerated Items” with only two images, and the last one, “Vitamins and Supplements” with fifty-three images, also set not to Autoplay, will not play or preview in the Dashboard. I tried deleting and recreating the same three sliders with no success.

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