fix: remove user part only at the beginning of path

Signed-off-by: Salvatore Martire <4652631+salmart-dev@users.noreply.github.com>

Author: salmart-dev

lib/private/Share20/DefaultShareProvider.php

@@ -47,6 +47,7 @@
 use OCP\Util;
 use Psr\Log\LoggerInterface;
 use function str_starts_with;
+use function strlen;
 
 /**
  * Class DefaultShareProvider
@@ -869,7 +870,10 @@ private function _getSharedWith(
 
 		$nonChildPath = '/';
 		if ($path !== null) {
-			$path = str_replace('/' . $userId . '/files', '', $path);
+			$prefix = '/' . $userId . '/files';
+			if (str_starts_with($path, $prefix)) {
+				$path = substr($path, strlen($prefix));
+			}
 			$path = rtrim($path, '/');
 
 			if ($path !== '') {