Check for conflicting RSS plugins using this shortcut

Sometimes issues that appear to be caused by Featured Images In RSS plugin are related to a conflicting plugin. Double images or double titles are common. The only way to know for sure is to to deactivate other plugins (while ours is active) to identify the conflict. Once you identify the conflicting plugin keep it deactivated or investigate the plugin's settings to see if you can turn off RSS features while keeping it active. 

Known Conflicting Plugins:

Rank Math SEO breaks feeds by adding title tags to images in the RSS feed incorrectly. We recommend disabling this plugin.
Yoast SEO has an RSS images option that can be disabled in their plugin settings.


Manual Method:

Try deactivating other plugins, a few at a time, and check the raw feed after each time, to see if it goes away. 

Once it does, reactivate those plugins one at a time, checking the feed each time, and see which one causes it to be added back.

Shortcut Using SSH:

Rather than blindly going through plugins, try this shortcut from our dev team. 

A more advanced method is to use SSH (you'll need be familiar with SSH and have SSH access), and use the grep command to find code relating to the RSS feed, 'the_excerpt_rss' is one good way:

cd wp-content/plugins/
grep -r 'the_excerpt_rss' *


For my site as an example, it displays:
# grep -r 'the_excerpt_rss' *
featured-images-for-rss-feeds/featured_images_in_rss.php: 'the_excerpt_rss',
featured-images-for-rss-feeds-premium/includes/premium/premium.php:add_filter( 'the_excerpt_rss', 'firss_insert_ads', 15 );
featured-images-for-rss-feeds-premium/includes/premium/premium.php:add_filter( 'the_excerpt_rss', 'firss_featured_images_in_rss_first_image', 1001, 1 );
featured-images-for-rss-feeds-premium/featured_images_in_rss.php: 'the_excerpt_rss',
feedzy-rss-feeds/includes/feedzy-rss-feeds-feed-tweaks.php:add_filter( 'the_excerpt_rss', 'feedzy_insert_thumbnail' );
wordpress-seo/src/integrations/front-end/rss-footer-embed.php: \add_filter( 'the_excerpt_rss', [ $this, 'embed_rssfooter_excerpt' ] );
wp-piwik/classes/WP_Piwik.php: add_filter ( 'the_excerpt_rss', array (

From that result, I see that plugins with these folder names have code affecting the RSS feed:

featured-images-for-rss-feeds
featured-images-for-rss-feeds-premium
feedzy-rss-feeds
wordpress-seo
wp-piwik


And I can narrow down which one is causing issues or conflicting with other plugins. 

The SSH commands just help find the plugins to target for deactivation, there’s no editing going on.

Get Our Help:

If you’d like help finding the plugin and you’re a Premium user, you can use the contact form to submit a tech support request. Login to your WordPress dashboard, visit the Featured Images In RSS plugin page, and click "contact us". We will require an admin login to your WordPress site to help. Use the "technical support" form to securely send the login info. 

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