My changes are not displayed on front-end
The latest versions of the Live Composer contain a caching engine to reduce the page loading times. If you cannot see the changes from your page when the Live Composer is closed, clear the cache or disable the feature from:
WP Admin > Live Composer > Settings > Performance.
Browser cache
Ensure that there are no issues with the browser cache and clear it or check the page with a private/incognito browser tab.