Extensive caching can complicate things if you’re working on your site and expecting to see changes immediately on the frontend. Purging cache is an essential part of the development process.
WPEngine - After you make a change on any WordPress site:
Figure: Make sure you "Purge All Caches" after making changes - This will allow others to see the changes immediately
More information: https://wpengine.com/support/cache/#Purge_Server_Caches