open-api: Heisenbug: periodic error TextMarshaler error

On creating a Netlify site with no settings site (params are empty), I’m periodically getting this:

netlify_site.test: &{0 } (*models.Error) is not supported by the TextConsumer, can be resolved by supporting TextUnmarshaler interface

Sorry, it is in Go => string format.

This is in a loop of creating/deleting a site with no params. Seems to be about 1 in 10 chance.