diff --git a/src/App.php b/src/App.php
index 21675b9dc3..316982dd28 100644
--- a/src/App.php
+++ b/src/App.php
@@ -248,7 +248,6 @@ class App
 		$this->profiler = $profiler;
 		$this->logger   = $logger;
 
-		$this->checkBackend($isBackend);
 		$this->checkFriendicaApp();
 
 		$this->profiler->reset();
@@ -318,6 +317,8 @@ class App
 			$this->module = 'home';
 		}
 
+		$this->isBackend = $isBackend || $this->checkBackend($this->module);
+
 		// Detect mobile devices
 		$mobile_detect = new MobileDetect();
 
@@ -623,10 +624,10 @@ class App
 	 * This isn't a perfect solution. But we need this check very early.
 	 * So we cannot wait until the modules are loaded.
 	 *
-	 * @param string $backend true, if the backend flag was set during App initialization
-	 *
+	 * @param string $module
+	 * @return bool
 	 */
-	private function checkBackend($backend) {
+	private function checkBackend($module) {
 		static $backends = [
 			'_well_known',
 			'api',
@@ -651,7 +652,7 @@ class App
 		];
 
 		// Check if current module is in backend or backend flag is set
-		$this->isBackend = (in_array($this->module, $backends) || $backend || $this->isBackend);
+		return in_array($module, $backends);
 	}
 
 	/**
diff --git a/src/Core/Session/CacheSessionHandler.php b/src/Core/Session/CacheSessionHandler.php
index c0a5896f42..6a1b32bfb1 100644
--- a/src/Core/Session/CacheSessionHandler.php
+++ b/src/Core/Session/CacheSessionHandler.php
@@ -31,7 +31,9 @@ class CacheSessionHandler extends BaseObject implements SessionHandlerInterface
 			Session::$exists = true;
 			return $data;
 		}
-		Logger::log("no data for session $session_id", Logger::TRACE);
+
+		Logger::notice('no data for session', ['session_id' => $session_id, 'uri' => $_SERVER['REQUEST_URI']]);
+
 		return '';
 	}
 
diff --git a/src/Core/Session/DatabaseSessionHandler.php b/src/Core/Session/DatabaseSessionHandler.php
index 9bb1180ec1..e3e95f9ed1 100644
--- a/src/Core/Session/DatabaseSessionHandler.php
+++ b/src/Core/Session/DatabaseSessionHandler.php
@@ -31,7 +31,8 @@ class DatabaseSessionHandler extends BaseObject implements SessionHandlerInterfa
 			Session::$exists = true;
 			return $session['data'];
 		}
-		Logger::log("no data for session $session_id", Logger::TRACE);
+
+		Logger::notice('no data for session', ['session_id' => $session_id, 'uri' => $_SERVER['REQUEST_URI']]);
 
 		return '';
 	}