Django form wizard instead of executing the done() method jumps to the first form?

Question

Django

Actually, on the local server, the wizard works as it should, and after filling out all the forms, it executes the done () method.
In production, instead of executing the done() method, the last step of the wizard switches to the first step, and the form fields are cleared.
Tell me which way to dig?

Answer 1

Most likely missing from the template.

{% if wizard.form.forms %}
    {{ wizard.form.management_form }}
    {% for form in wizard.form.forms %}
        {{ form }}
    {% endfor %}
{% else %}
    {{ wizard.form }}
{% endif %}

Or, if file upload is used, Storage.