Unable to share subfolders of group folders when using external default storage

I’m using nextcloud 13.0.0 and groupfolders app, I’ve configured in config.php a default s3 storage

array (
    'class' => 'OC\\Files\\ObjectStore\\S3',
    'arguments' => 
    array (
      'bucket' => 'SOMEBUCKETbBB',
      'autocreate' => true,
      'key' => 'SOMEKEY',
      'secret' => 'SOMESECRET',
      'hostname' => 's3-eu-central-1.amazonaws.com',
      'region' => 'eu-central-1',

I’ve created a group folder where I have sharing and writing permission, if I create and share a subfolder with another user or group, that other user can’t see the newly shared folder.
No error is logged.

Sharing via link works.