There is an inconsistency in how default values are handled for hidden fields versus visible ones.

A hidden field's default value is applied on every save, overwriting any existing value. For visible fields, the default is correctly applied only if the field is empty.

This is problematic, among others, for fields like a UUID, which should be set only once when a record is created and then never change. Currently, editing the record incorrectly generates a new UUID every time:

  - name: uuid
    label: Identifier
    type: uuid
    hidden: true
    options:
      editable: false
      generate: false