In a custom theme pack a user property is displayed in a top-tab. Because the page template header does not refresh when the page reloads (such as when submitting a form widget), the value in the top tab does not change. It only does so when the browser tab is manually refreshed to reload the entire page.
How can I force the template header to refresh to re-fetch the property’s value when the page reloads (e.g. a form is submitted or the user views a different page or tab)?