ACF (Advanced Custom Fields) is a powerful plugin for WordPress that enhances the ability to create custom fields and complex content management solutions. However, sometimes you may encounter conflicts with other plugins or themes that can disrupt your site’s functionality. This guide will help you identify and resolve these conflicts effectively.
Infrastructure Context
In live WordPress environments, issues like this are rarely isolated. We typically see them as part of a broader infrastructure pattern involving updates, plugin compatibility, performance constraints, or database integrity. Teams running WordPress at scale treat these issues as ongoing operational concerns—not one-off fixes—because reliability, security, and continuity matter once a site is in production.
First, ensure that you have the latest version of the ACF plugin installed. Regular updates fix bugs and compatibility issues. To check for updates, go to your WordPress dashboard, navigate to Plugins, and look for any available updates for ACF.
If you are still experiencing issues, start by disabling all plugins except for ACF. This step will help you determine if the problem is due to a specific plugin conflict. To disable plugins, go to Plugins, select all, and then choose Deactivate from the bulk actions dropdown menu. After deactivating the plugins, check if ACF is functioning properly. If it is, you can re-enable the plugins one by one, checking each time to identify which plugin is causing the conflict.
Next, consider the theme you are using. Some themes may not be fully compatible with ACF. To check for conflicts from the theme, temporarily switch to a default WordPress theme like Twenty Twenty-One. Navigate to Appearance > Themes and activate a default theme. If ACF works correctly with the default theme, you’ll need to troubleshoot or update your original theme.
Another common source of conflicts is caching plugins. If you have a caching plugin installed, clear the cache after making any changes related to plugins or themes. This step ensures that old cached versions of your pages are not loaded, which can cause issues. Check your caching settings and clear your site’s cache to see if that resolves the conflict.
If you’ve identified a specific plugin that conflicts with ACF, contact the plugin’s support team or check their support forum for solutions. The conflict may be known, and the developers may have provided a patch or fix to resolve it. Be clear about the issue you are facing and any steps you have taken to diagnose it.
Sometimes, conflicts may arise due to custom code in your theme or other plugins. If you’ve added custom functions or scripts, try temporarily removing them and check if the ACF plugin starts working. Review your code for any errors or deprecated functions.
Finally, consider reaching out to the ACF support community. The ACF forums are filled with experienced users and developers who may have encountered similar issues. Provide as much detail as possible about the conflict you are facing, including your WordPress version, theme, and list of plugins. This information will help others assist you more effectively.
By following these steps, you should be able to identify and resolve conflicts with the ACF plugin in WordPress effectively. Always back up your site before making any significant changes to avoid losing data. With a little patience and perseverance, you can ensure that your ACF functionalities run smoothly.
Architectural Context: Before committing to ACF long-term, review Is ACF Still the Right Choice in 2026?.
Running into ACF issues in production?
We handle ACF breakage, performance issues, and update-related failures as part of our managed WordPress operations — before they impact users.
About the Author
Martin is the Lead WordPress Infrastructure & Security Engineer at CriticalWP, where he leads enterprise WordPress architecture, security hardening, performance optimization, and incident response for high-traffic and mission-critical platforms. He specializes in diagnosing complex WordPress failures, preventing security incidents, and building resilient infrastructure for organizations that rely on WordPress at scale.