diff --git a/packages/edit-post/src/store/actions.js b/packages/edit-post/src/store/actions.js
index 8dd473dd9a33f..d00f7472382f8 100644
--- a/packages/edit-post/src/store/actions.js
+++ b/packages/edit-post/src/store/actions.js
@@ -9,6 +9,7 @@ import {
 } from '@wordpress/editor';
 import deprecated from '@wordpress/deprecated';
 import { addFilter } from '@wordpress/hooks';
+import { store as coreStore } from '@wordpress/core-data';
 
 /**
  * Internal dependencies
@@ -289,9 +290,21 @@ export const requestMetaBoxUpdates =
 			window.tinyMCE.triggerSave();
 		}
 
+		// We gather the base form data.
+		const baseFormData = new window.FormData(
+			document.querySelector( '.metabox-base-form' )
+		);
+
+		const postId = baseFormData.get( 'post_ID' );
+		const postType = baseFormData.get( 'post_type' );
+
 		// Additional data needed for backward compatibility.
 		// If we do not provide this data, the post will be overridden with the default values.
-		const post = registry.select( editorStore ).getCurrentPost();
+		// We cannot rely on getCurrentPost because right now on the editor we may be editing a pattern or a template.
+		// We need to retrieve the post that the base form data is referring to.
+		const post = registry
+			.select( coreStore )
+			.getEditedEntityRecord( 'postType', postType, postId );
 		const additionalData = [
 			post.comment_status
 				? [ 'comment_status', post.comment_status ]
@@ -301,10 +314,7 @@ export const requestMetaBoxUpdates =
 			post.author ? [ 'post_author', post.author ] : false,
 		].filter( Boolean );
 
-		// We gather all the metaboxes locations data and the base form data.
-		const baseFormData = new window.FormData(
-			document.querySelector( '.metabox-base-form' )
-		);
+		// We gather all the metaboxes locations.
 		const activeMetaBoxLocations = select.getActiveMetaBoxLocations();
 		const formDataToMerge = [
 			baseFormData,