Using jsona with either NextDrupal or @drupal-api-client/json-api-client does not return field data

[lieb77]

With either client, regardless of the query parameters, all I get back is

{
    type: 'node--page',
    id: 'Some - UUID',
    links: { self: [Object] }
  },

for each node in the response set. If I run the same query without jsona I get the full data set, which includes many fields.

Running under Node.js v23.8.0 / Next.js 15.2.2 / next-drupal 2.0 or @drupal-api-client/json-api-client 1.3.0
My Drupal sites are running Drupal 10.4.4 and 11.1.4 - I get the same results with either

Just to be sure it's not my site if I go to my-site/jsonapi/node/page I get the complete data set.

Thank you.