I believe the problem happens before you have multiple App IDs on your site:
- One is added by your Facebook Pixel code
- Another is added by the Facebook Widget provided by Jetpack. For this widget, we define our own App ID so everyone can add the widget to their own site without having to create an app on Facebook.
- Another is added in the middle of your post content, in a Facebook Page plugin you’ve inserted there using the app ID
973129142804697
.
We can help you change the app ID used by the Jetpack widget. To do so, you’ll need to add the following code snippet to your site:
/**
* Use own Facebook App ID with Jetpack's Facebook widget.
*
* @see https://www.ads-software.com/support/topic/facebook-app-id-13/
*/
add_filter( 'jetpack_sharing_facebook_app_id', function() { return '457655571318537'; } );
(note that I’ve re-used the app ID you had used for your Facebook Pixel code in the snippet above).
On your end, I would recommend updating the Facebook Page plugin you’ve added to your post content as well.