Hello Mikko,
Thanks for your response.
Inside the relevanssi_post_content filter hook we have the same content as above.
Our solution is to render the blocks inside this filter by adding this :
add_filter( 'relevanssi_post_content', function(string $post_content, object $post_object) {
$rendered_post_content = '';
$blocks = parse_blocks( $post_content );
foreach( $blocks as $block ) {
$rendered_post_content .= render_block( $block );
}
return $rendered_post_content;
}, 10, 2 );