When either CSS or JS aggregation is enabled, Drupal tries to serve the aggregated files with their proper MIME types, but RedirectComingSoonSubscriber::redirectToComingSoonEvent() sends the Coming Soon page as text/html in their place, causing browser errors and loss of functionality.
Enable coming soon mode without aggregation enabled, and clear cache. The page should load & function normally. Enable aggregation and clear cache. The CSS will not load, and any JavaScript (such as Antibot on permitted forms) will not work.
Exclude static files from redirection.
Make a MR.
Active
1.3
Code
Because this alters the same file as https://www.drupal.org/project/comingsoon_mode/issues/3532828 ✨ Provide options for login & registration links Active I'm going to address it there to prevent merge conflicts.