diff --git a/includes/Data/ContentBlocksResolver.php b/includes/Data/ContentBlocksResolver.php
index fed297d5..fc18115e 100644
--- a/includes/Data/ContentBlocksResolver.php
+++ b/includes/Data/ContentBlocksResolver.php
@@ -55,7 +55,7 @@ public static function resolve_content_blocks( $node, $args, $allowed_block_name
 			$parsed_blocks,
 			function ( $parsed_block ) {
 				// Strip empty comments and spaces
-				return ! empty( trim( preg_replace('/<!--(.*)-->/Uis', '', $parsed_block['innerHTML']) ) );
+				return ! empty( trim( preg_replace( '/<!--(.*)-->/Uis', '', render_block( $parsed_block ) ) ) );
 			},
 			ARRAY_FILTER_USE_BOTH
 		);