diff --git a/api/asyncwrapper.php b/api/asyncwrapper.php
index 07316aecc6..8d0ccf39b4 100644
--- a/api/asyncwrapper.php
+++ b/api/asyncwrapper.php
@@ -3,8 +3,11 @@
 /**
  * API - run Timed Asynchron Services for all EGroupware domain/instances
  *
+ * To work around caching-problems (PHP cli uses different shared memory then FPM) we
+ * try first to call asyncservices.php via HTTP, before falling back to the old PHP cli call.
+ *
  * @link http://www.egroupware.org
- * @author Lars Kneschke
+ * @author Ralf Becker
  * @license http://opensource.org/licenses/gpl-license.php GPL - GNU General Public License
  * @package api
  * @access public
@@ -12,11 +15,29 @@
 
 $path_to_egroupware = realpath(__DIR__.'/..');	//  need to be adapted if this script is moved somewhere else
 
+// we try http://nginx/ (Docker), http://localhost/ or cli
+$methods = ['http://localhost/egroupware/api/asyncservices.php','cli'];
+if (gethostbyname('nginx.') !== 'nginx.')
+{
+	array_unshift($methods, 'http://nginx/egroupware/api/asyncservices.php');
+}
+
 foreach(file($path_to_egroupware. '/header.inc.php') as $line)
 {
 	if(preg_match("/GLOBALS\['egw_domain']\['(.*)']/", $line, $matches))
 	{
-		// -d memory_limit=-1 --> no memory limit
-		system(PHP_BINARY. ' -q -d memory_limit=-1 '.$path_to_egroupware.'/api/asyncservices.php '. $matches[1]);
+		foreach($methods as $key => $url)
+		{
+			if ($url !== 'cli')
+			{
+				$url .= '?run_by=crontab&domain='.urlencode($matches[1]);
+				if (file_get_contents($url) !== false) break;
+			}
+			else
+			{
+				// -d memory_limit=-1 --> no memory limit
+				system(PHP_BINARY. ' -q -d memory_limit=-1 '.$path_to_egroupware.'/api/asyncservices.php '. $matches[1]);
+			}
+		}
 	}
 }