diff --git a/src/wp-admin/edit-form-blocks.php b/src/wp-admin/edit-form-blocks.php
index ecf83f2017..91e4b1e37d 100644
--- a/src/wp-admin/edit-form-blocks.php
+++ b/src/wp-admin/edit-form-blocks.php
@@ -55,13 +55,6 @@ $rest_path = rest_get_route_for_post( $post );
 $preload_paths = array(
 	'/wp/v2/types?context=view',
 	'/wp/v2/taxonomies?context=view',
-	add_query_arg(
-		array(
-			'context'  => 'edit',
-			'per_page' => -1,
-		),
-		rest_get_route_for_post_type_items( 'wp_block' )
-	),
 	add_query_arg( 'context', 'edit', $rest_path ),
 	sprintf( '/wp/v2/types/%s?context=edit', $post_type ),
 	'/wp/v2/users/me',
diff --git a/src/wp-admin/site-editor.php b/src/wp-admin/site-editor.php
index 70d646ae51..6951d05e55 100644
--- a/src/wp-admin/site-editor.php
+++ b/src/wp-admin/site-editor.php
@@ -91,7 +91,7 @@ $preload_paths = array(
 	array( '/wp/v2/media', 'OPTIONS' ),
 	'/wp/v2/types?context=view',
 	'/wp/v2/types/wp_template?context=edit',
-	'/wp/v2/types/wp_template-part?context=edit',
+	'/wp/v2/types/wp_template_part?context=edit',
 	'/wp/v2/templates?context=edit&per_page=-1',
 	'/wp/v2/template-parts?context=edit&per_page=-1',
 	'/wp/v2/themes?context=edit&status=active',