querying board and subitems - column values are all null

[brondavies]

Using the following query, I get a list of items returned but all of the column values are null. What’s going on?

{
  boards(ids: [2881708926]) {
    name
    items_page(
      limit: 20
    ) {
      items {
        id
        name
        subitems {
          id
          name
          column_values {
            id
            text
            value
          }
        }
        column_values {
          id
          text
          value
        }
      }
    }
  }
}