From b35aa513ab0b7868eea897126cca22d655c1b6a7 Mon Sep 17 00:00:00 2001
From: Roman Kreisel <mail@romankreisel.de>
Date: Thu, 21 Jan 2016 17:29:14 +0100
Subject: [PATCH] Solves #

---
 lib/private/group/manager.php | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/lib/private/group/manager.php b/lib/private/group/manager.php
index 2c28f3b0e7..98e5551bcc 100644
--- a/lib/private/group/manager.php
+++ b/lib/private/group/manager.php
@@ -126,10 +126,15 @@ class Manager extends PublicEmitter implements IGroupManager {
 	 */
 	public function addBackend($backend) {
 		$this->backends[] = $backend;
+		$this->clearCaches();
 	}
 
 	public function clearBackends() {
 		$this->backends = array();
+		$this->clearCaches();
+	}
+	
+	protected function clearCaches() {
 		$this->cachedGroups = array();
 		$this->cachedUserGroups = array();
 	}