This issue appears on a full updated theme with no apparent conflicts or issues

The Solution

The most common cause of this issue is more than one slider being called on the homepage, or a second slider widget accidentally placed in the footer or sidebar.
The duplicate widget causes a script conflict when both load with auto-slide enabled.

  1. Go to AppearanceWidgets and verify only one instance of the Slider widget exists in any panel
  • If you have a widgetized page template, temporarily remove any slider widgets from the widgetized page slider panel
  • Expand your remaining slider widget and ensure all filters are selected by clicking Save after each drop-down menu selection.
  • Ensure a positive value of less than 5 is in the Auto-Interval field.
  • Ensure the Thumbnail selection is set to Post Featured Image or Thumbnails – auto-slide should not be used in combination with videos.