there's an alias set
EzSystems\EzPlatformPageFieldType\Event\Subscriber\BlockResponseSubscriber: '@EzSystems\EzPlatformPageBuilder\Event\Subscriber\EditorialBlockResponseSubscriber'
but new to 1.3.3, the EditorialBlockResponseSubscriber now does nothing for front end calls
onBlockResponse has
if (!$isEditorialContext)

whereas it use to have
try {
$blockContent = $this->blockService->render($blockContext, $event->getBlockValue());
now blockContent never gets set front end