Where to post issues with the GraphQL API?

Hello,
I tried out the GraphQL API but some nodes that would provide the data for our app does not work and responses with HTTP-50x. Where to post that issue? I cannot find a bug tracking topic to it, there is only “REST API”.

The graph node that doesn’t work on my instance is (of course with a valid ARI for the project):

query MyQuery($id: ID = "") {
  jira {
    jiraProject(id: $id) {
      softwareBoards {
        edges {
          node {
            id
          }
        }
      }
    }
  }
}