diff --git a/lib/private/Log.php b/lib/private/Log.php
index b1ab40812a577..64b052e361c72 100644
--- a/lib/private/Log.php
+++ b/lib/private/Log.php
@@ -373,10 +373,10 @@ public function logData(string $message, array $data, array $context = []): void
 		$level = $context['level'] ?? ILogger::ERROR;
 
 		$minLevel = $this->getLogLevel($context, $message);
-		$data = array_map($this->normalizer->format(...), $data);
 
 		try {
 			if ($level >= $minLevel) {
+				$data = array_map($this->normalizer->format(...), $data);
 				$data['message'] = $message;
 				if (!$this->logger instanceof IFileBased) {
 					$data = json_encode($data, JSON_PARTIAL_OUTPUT_ON_ERROR | JSON_UNESCAPED_SLASHES);