diff --git a/lib/private/User/Database.php b/lib/private/User/Database.php
index 6cbcef9629e94..db092dc6ef8d4 100644
--- a/lib/private/User/Database.php
+++ b/lib/private/User/Database.php
@@ -374,7 +374,7 @@ public function checkPassword(string $loginName, string $password) {
 	 */
 	private function loadUser(string $loginName, bool $tryEmail = true): bool {
 		if (isset($this->cache[$loginName])) {
-			return true;
+			return $this->cache[$loginName] !== false;
 		}
 
 		//guests $uid could be NULL or ''