using array_diff_assoc to detect diffs in values as well

lib/private/files/cache/scanner.php

@@ -142,7 +142,7 @@ class Scanner extends BasicEmitter {
 							}
 						}
 						// Only update metadata that has changed
-						$newData = array_diff($data, $cacheData);
+						$newData = array_diff_assoc($data, $cacheData);
 						if (isset($newData['etag'])) {
 							$cacheDataString = print_r($cacheData, true);
 							$dataString = print_r($data, true);