Text of tags column is null in API version 2023-10 and above

Before API version 2023-10, tags were included as string in column_values response:

// Before 2023-10

// Query
column_values {
  id
  text
  type
  value
}

// Response
{
  "id": "tags",
  "text": "foo, bar",
  "type": "tag",
  "value": "{\\"tag_ids\\":[20407053,20407055]}"
}

Since 2023-10, the text is now null, even though there is an example in the documentation that shows how text can be retrieved:

// Since 2023-10

// Query
column_values {
    id
    type
    value
    ... on TagsValue {
      text
    }
}

// Response
{
    "id": "tags",
    "type": "tags",
    "value": "{\\"tag_ids\\":[20407053,20407055]}",
    "text": null
}

Is this a bug or is text to be expected to always be null?