Data isn't updating with gatsby-source-wordpress (Advanced Custom Fields)

[jackharding]

Fields that I know are populated are returning null after running gatsby develop. Running the equivalent query in the WP GraphQL playground returns the correct data. I've tried first running gatsby clean but the problem remains. Is there some kind of caching going on elsewhere?

The query:

query WhoWeArePage {
  wpPage(slug: {eq: "who-we-are"}) {
    whoWeAreFields {
      header {
        title
        text
      }
    }
  }
}

Versions:
"gatsby": "^3.2.1"
"gatsby-source-wordpress": "^5.2.3"