This must be something minor, but I can’t seem to put my finger on it. Why are the values of the <.form> not reset on a successful phx-submit?

defmodule AppWeb.SomePageLive
  def render(assigns) do
    ~H"""
      <.live_component
        id="some-id"
        module={AppWeb.PostingBarComponent}
        topic={@selected_topic}
        user={@current_user}
      />
    """
  end
end

defmodule AppWeb.PostingBarComponent
  use Phoenix.LiveComponent
  use AppWeb, :html
  import Phoenix.HTML.Form

  def mount(socket) do
    {:ok, assign(socket,
      post_draft: to_form(empty_changeset())
    )}
  end

  def render(assigns) do
    ~H"""
    <div>
      <.form
        for={@post_draft}
        id="form-id"
        phx-submit="submit_post"
        phx-target={@myself}
      >
        <%= textarea(@post_draft, :content,
          id: "post-input",
          rows: 1,
          placeholder: "Post to ##{@topic.name}"
        ) %>
        <button type="submit">Submit</button>
      </.form>
    </div>
    """
  end

  def handle_event("submit_post", %{"post" => post}, %{assigns: assigns} = socket) do
    %{topic: topic, user: user} = assigns
    %{"content" => content} = post

    case App.Social.create_post(content, topic.id, user.id) do
      {:ok, _} ->
        {:noreply, assign(socket,
          post_draft: to_form(empty_changeset())
        )}

      {:error, changeset} ->
        {:noreply, assign(socket, post_draft: to_form(changeset))}
    end
  end

  defp empty_changeset() do
    %App.Social.Post{}
    |> Ecto.Changeset.change()
  end
end