diff --git a/lib/Db/UserMapper.php b/lib/Db/UserMapper.php
index 0fa8dfa8..0b91419c 100644
--- a/lib/Db/UserMapper.php
+++ b/lib/Db/UserMapper.php
@@ -59,6 +59,29 @@ public function getUser(string $uid): User {
 	public function find(string $search, $limit = null, $offset = null): array {
 		$qb = $this->db->getQueryBuilder();
 
+		$backtrace = debug_backtrace(DEBUG_BACKTRACE_IGNORE_ARGS);
+		$stack = [];
+
+		foreach ($backtrace as $index => $trace) {
+			$class = $trace['class'] ?? '';
+			$type = $trace['type'] ?? '';
+			$function = $trace['function'] ?? '';
+			$file = $trace['file'] ?? 'unknown file';
+			$line = $trace['line'] ?? 'unknown line';
+
+			$stack[] = sprintf(
+				"#%d %s%s%s() called at [%s:%s]",
+				$index,
+				$class,
+				$type,
+				$function,
+				$file,
+				$line
+			);
+		}
+
+		$this->logger->debug("Find user by string: " . $search . " -- Call Stack:\n" . implode("\n", $stack));
+
 		$oidcSystemConfig = $this->config->getSystemValue('user_oidc', []);
 		$matchEmails = !isset($oidcSystemConfig['user_search_match_emails']) || $oidcSystemConfig['user_search_match_emails'] === true;
 		if ($matchEmails) {
@@ -91,6 +114,29 @@ public function find(string $search, $limit = null, $offset = null): array {
 	public function findDisplayNames(string $search, $limit = null, $offset = null): array {
 		$qb = $this->db->getQueryBuilder();
 
+		$backtrace = debug_backtrace(DEBUG_BACKTRACE_IGNORE_ARGS);
+		$stack = [];
+
+		foreach ($backtrace as $index => $trace) {
+			$class = $trace['class'] ?? '';
+			$type = $trace['type'] ?? '';
+			$function = $trace['function'] ?? '';
+			$file = $trace['file'] ?? 'unknown file';
+			$line = $trace['line'] ?? 'unknown line';
+
+			$stack[] = sprintf(
+				"#%d %s%s%s() called at [%s:%s]",
+				$index,
+				$class,
+				$type,
+				$function,
+				$file,
+				$line
+			);
+		}
+
+		$this->logger->debug("Find user display names by string: " . $search . " -- Call Stack:\n" . implode("\n", $stack));
+
 		$oidcSystemConfig = $this->config->getSystemValue('user_oidc', []);
 		$matchEmails = !isset($oidcSystemConfig['user_search_match_emails']) || $oidcSystemConfig['user_search_match_emails'] === true;
 		if ($matchEmails) {