Featured Event Shortcode Not Working

We are using [ecs-list-events featured_only='true' limit='1' venue='true' thumb='true'] to display one featured event on the home page. The current even showing has been unchecked as featured and a different event has been marked as featured yet the site hasn’t updated. We’ve cleared cache and have tried several browsers with same results. I increased the limit to 10 and it actually pulls many other events that are NOT marked as featured. This seemed to have been working when we initially set it up. All plugins and WP core are up-to-date running latest versions. Any help resolving this would be appreciated.

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