Conditionally rendering inputs_for raising exception

Hello. I’m building a dynamic input. It’s crashing when I thought it should be fine. I’m writing it like this:

<%= if @form_stakeholder_option == :new_stakeholder do %>
  <.inputs_for
    :let={stakeholder}
    :if={@form_stakeholder_option == :new_stakeholder}
    field={@form[:stakeholder]}
  >
    <.input field={stakeholder[:company_id]} type="hidden" value={@company_id} />
    <.input field={stakeholder[:name]} type="text" label="Name" />
    <.input field={stakeholder[:email]} type="email" label="Email" />
  </.inputs_for>
<% else %>
  <.input
    :if={@form_stakeholder_option == :existing_stakeholder}
    field={@form[:stakeholder_id]}
    type="select"
    prompt="Choose a stakeholder"
    options={@stakeholders}
  />
<% end %>

On a radio button click, I fire an event, and I replace the form_stakeholder_option with :existing_stakeholder. The raised exception is

* (ArgumentError) using inputs_for for association `stakeholder` from `Captain.Schemas.Safe` but it was not loaded. Please preload your associations before using them in inputs_for

Shouldn’t the code that uses inputs_for don’t render given that I have the conditional if?

Extra information

My radio buttons are built like this. (I skipped the other radio button)

<input
  type="radio"
  name="stakeholder_option"
  id="new-stakeholder"
  value="new_stakeholder"
  class="h-4 w-4 border-gray-300 text-zinc-700 focus:ring-0"
  phx-update="ignore"
  checked={@form_stakeholder_option == :new_stakeholder}
  phx-click="change-stakeholder-option"
  phx-target={@myself}
/>
<label for="new-stakeholder" class="block text-sm font-medium leading-6 text-gray-900">
  New stakeholder
</label>

I’m changing the @form_stakeholder_option like this:

  def handle_event("change-stakeholder-option", %{"value" => value}, socket) do
    {:noreply, assign(socket, form_stakeholder_option: String.to_existing_atom(value))}
  end

How could I achieve what I want? Depending on the radio button, I either show the stakeholder nested assoc inputs or a select input.