Post content block: apply the_content filter before checking if conte…

…nt is empty (#31997)

* Post content block: apply the_content filter before checking if content is empty

* Simplify duplicate logic

packages/block-library/src/post-content/index.php

@@ -49,16 +49,15 @@ function render_block_core_post_content( $attributes, $content, $block ) {
 	}
 
 	$content = get_the_content( null, false, $post_id );
+	/** This filter is documented in wp-includes/post-template.php */
+	$content = apply_filters( 'the_content', str_replace( ']]>', ']]>', $content ) );
+	unset( $seen_ids[ $post_id ] );
 
 	if ( empty( $content ) ) {
-		unset( $seen_ids[ $post_id ] );
 		return '';
 	}
 
 	$wrapper_attributes = get_block_wrapper_attributes( array( 'class' => 'entry-content' ) );
-	/** This filter is documented in wp-includes/post-template.php */
-	$content = apply_filters( 'the_content', str_replace( ']]>', ']]>', $content ) );
-	unset( $seen_ids[ $post_id ] );
 
 	return (
 		'<div ' . $wrapper_attributes . '>' .