Issue with hidden fields

[Kayden]

I’m trying to set hidden fields on a form.

What I’ve tried:
URL params
https://form.feathery.io/to/<slug>/?hiddenfield=notworking
Javascript SDK
Feathery.setFieldValues({ "hiddenfield": "notworking" })

After submitting a form, I see the Form Fields but I don’t see any hidden fields showing up. Am I doing something wrong? Or is there a bug?

[peter]

Make sure to actually create the hidden field in the dashboard first before attempting to set it: Hidden Fields - Feathery Docs