diff --git a/wp-admin/post.php b/wp-admin/post.php
index 291a1a6ac0..3422e1886a 100644
--- a/wp-admin/post.php
+++ b/wp-admin/post.php
@@ -96,6 +96,14 @@ switch ( $action ) {
 		$_POST['comment_status'] = get_default_comment_status( $post->post_type );
 		$_POST['ping_status']    = get_default_comment_status( $post->post_type, 'pingback' );
 
+		// Wrap Quick Draft content in the Paragraph block.
+		if ( false === strpos( $_POST['content'], '<!-- wp:paragraph -->' ) ) {
+			$_POST['content'] = sprintf(
+				'<!-- wp:paragraph -->%s<!-- /wp:paragraph -->',
+				str_replace( array( "\r\n", "\r", "\n" ), '<br />', $_POST['content'] )
+			);
+		}
+
 		edit_post();
 		wp_dashboard_quick_press();
 		exit;
diff --git a/wp-includes/version.php b/wp-includes/version.php
index 20fee7400b..4cc9ef10c3 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -13,7 +13,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '5.4-alpha-47190';
+$wp_version = '5.4-alpha-47191';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.