Answered Problem with AliasMap

$fields['createdby'] = 1;
$fields['parent'] = 10;
$fields['template'] = 2;
$fields['alias'] = date("Y-m-d_H:i:s");
$fields['hidemenu'] = 1;
$fields['published'] = 1;
$fields['pagetitle'] = date("Y-m-d_H:i:s");

$response = $modx->runProcessor('resource/create', $fields);  

if ($response->isError()) {
	// An error occurred
	if ($response->hasFieldErrors()) {
	  $fieldErrors = $response->getAllErrors();
	  $errorMessage = implode("\n", $fieldErrors);
	}
  else {
    $errorMessage = 'An error occurred: ' . $response->getMessage();
  }
  $modx->log(xPDO::LOG_LEVEL_ERROR,$errorMessage);
}

//request resource for Processor
$sgMessage = $response->getObject();	//contains only ID
$sgMessageId=$sgMessage['id'];
$sgMessage=$modx->getObject('modResource', array('id'=>$sgMessageId));	//get rescource object
//set content
$sgContent="test";
$sgMessage->set('content',$sgContent);
$sgMessage->save();

//FAILS: The Url isn`t in the aliasMap
$sgURL=array_search($sgMessageId,$modx->aliasMap);
print_r($modx->aliasMap); //Debug aliasMap

//FAILS: depent on aliasMap
$sgMessageLink=$modx->makeUrl($sgMessageId, '', '', 'full');

//WORKS for every other ID except the created:
$sgMessageLinkFix=$modx->makeUrl(125, '', '', 'full');

$modx->cacheManager->refresh();
//OR / AND
$modx->cacheManager->generateContext('web');