Hi @jlamb
That’s weird. Could you please make sure that no other field has the same name on the page?
Also, could you please try to reproduce the issue on one of the WordPress’ stock themes (like Twenty Fifteen) with other plugins deactivated? If it disappears, then you can activate the theme and plugins one by one to see which one causes the issue.
If the issue persists, could you please submit a new ticket here: https://support.advancedcustomfields.com/new-ticket? Please explain the issue again and provide the temporary credentials to your site in the ticket.
Thanks 🙂
