Thanks for writing in! This issue could just be related to caching. Please keep in mind that you have installed a caching plugin WP Fastest Cache,
please clear your plugin cache and regenerate the minified JS/CSS files before testing your site. This can cause the changes to not take place on the front end. It will eventually show up when the cache regenerates, but it’s not ideal if you’re looking to see your changes immediately. Caching plugins are best to turn on only when you’ve finished building the site.
And please clear your browser cache too. You may use private browsing mode in testing your site to make sure that you are viewing the latest codes from the updates and not the cached version in your browser.
Kindly let us know how it goes.