Valid Design Management GraphQL query produces an error

The GraphQL schema allows a query like this:

{
  project(fullPath: "root/test") {
    issue(iid: "1") {
      designCollection {
        versions {
          nodes {
            designAtVersion {
              event
            }
          }
        }
      }
    }
  }
}

However, the query results in an error like this:

{
  "data": {
    "project": {
      "issue": {
        "designCollection": {
          "versions": {
            "nodes": [
              null,
              null,
              null
            ]
          }
        }
      }
    }
  },
  "errors": [
    {
      "message": "Exactly one of filename, id, design_id expected, got []",
      "locations": [
        {
          "line": 171,
          "column": 13
        }
      ],
      "path": [
        "project",
        "issue",
        "designCollection",
        "versions",
        "nodes",
        0,
        "designAtVersion"
      ]
    },
    {
      "message": "Exactly one of filename, id, design_id expected, got []",
      "locations": [
        {
          "line": 171,
          "column": 13
        }
      ],
      "path": [
        "project",
        "issue",
        "designCollection",
        "versions",
        "nodes",
        1,
        "designAtVersion"
      ]
    },
    {
      "message": "Exactly one of filename, id, design_id expected, got []",
      "locations": [
        {
          "line": 171,
          "column": 13
        }
      ],
      "path": [
        "project",
        "issue",
        "designCollection",
        "versions",
        "nodes",
        2,
        "designAtVersion"
      ]
    }
  ]
}