Private System Note Disclosure using GraphQL

Summary When you use the REST API or UI to view an issue's discussion/notes, private system note is hidden to member's only.

query {
  project(fullPath:"username16/ci-test"){
    issue(iid:"1"){
      descriptionHtml

      notes{
        edges{
          node{
            bodyHtml
            system
            author{
              username
            }
            body
          }
        }
      }
    }}
  }