Custom link not sticking

Plugin installed without issue, input field below feature image in dashboard as expected. However when we add the url it doesn’t seem to take effect. Using theme “One” by evolve themes. Very stable and mature theme to date. Alternately you can see the post featured on the home page with the feature image and text excerpt. (“overture.coop”). Using current version of the theme and WP.

The page I need help with: [log in to see the link]