diff --git a/src/wp-admin/edit-form-blocks.php b/src/wp-admin/edit-form-blocks.php
index 969d138ecb..1ed9fb0792 100644
--- a/src/wp-admin/edit-form-blocks.php
+++ b/src/wp-admin/edit-form-blocks.php
@@ -77,16 +77,22 @@ wp_add_inline_script(
  * Assign initial edits, if applicable. These are not initially assigned to the persisted post,
  * but should be included in its save payload.
  */
-$initial_edits = null;
+$initial_edits = array();
 $is_new_post   = false;
 if ( 'auto-draft' === $post->post_status ) {
 	$is_new_post = true;
 	// Override "(Auto Draft)" new post default title with empty string, or filtered value.
-	$initial_edits = array(
-		'title'   => $post->post_title,
-		'content' => $post->post_content,
-		'excerpt' => $post->post_excerpt,
-	);
+	if ( post_type_supports( $post->post_type, 'title' ) ) {
+		$initial_edits['title'] = $post->post_title;
+	}
+
+	if ( post_type_supports( $post->post_type, 'content' ) ) {
+		$initial_edits['content'] = $post->post_content;
+	}
+
+	if ( post_type_supports( $post->post_type, 'excerpt' ) ) {
+		$initial_edits['excerpt'] = $post->post_excerpt;
+	}
 }
 
 // Preload server-registered block schemas.