AshPhoenix.Form fails in submit without errors with embedded resources

defmodule Marketplace.Markets.Property.OffMarket do
  @moduledoc false

  use Ash.Resource,
    data_layer: :embedded,
    extensions: [AshGraphql.Resource]

  code_interface do
    define_for Marketplace.Markets

    define :new
  end

  attributes do
    alias Marketplace.Ash.Types.PhoneNumber

    attribute :agent_name, :string
    attribute :agent_phone_number, PhoneNumber

    attribute :company_name, :string, allow_nil?: false
    attribute :company_phone_number, PhoneNumber
  end

  graphql do
    type :off_market
  end

  actions do
    defaults [:update, :read, :destroy]

    create :new, primary?: true
  end
end

AshPhoenix.Form.for_update(property, :update,
      api: Markets,
      actor: user,
      forms: [auto?: true],
      prepare_source: fn changeset ->
        changeset
        |> Ash.Changeset.set_argument(:uploaded_images, [])
        |> Ash.Changeset.set_argument(:removed_images, [])
      end
    )