My changes are not displayed on front-end
The latest versions of the Live Composer contain a caching engine to reduce 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.