Hello,
The “WP Rocket delay JS exclusions” option from our theme does not directly populate this field, as it is exclusively controlled by the plugin. Any background overwriting could erase values that users have manually added. In practice, the values from the theme’s “WP Rocket delay JS exclusions” option and the “Excluded JavaScript files” field in the WP Rocket plugin are merged into a single array and applied to the site.
Thank you for your feedback; we will work on updating our documentation to make the functionality of these options clearer for end users.
Best Regards.