Google Analytics 3 Revenue Tracking broke

Hi!
I am also throwing my hat into the ring and ask for help. Google Analytics eCommerce Tracking broke after the ~6th of October on three different sites. They all have the same setup.

I suspect this has to do with a WP / WooCommerce update or Google Analytics / GTM changed how they want the data layer to look like. I am not aware that GTM4WP was updated.

I have set up everything in WordPress, GTM and GA according to this guide:
https://gtm4wp.com/how-to-articles/how-to-setup-enhanced-ecommerce-tracking

To comply with GDPR, I used Trigger Groups, combining the triggers from the guide with the Borlabs Opt-In Triggers: https://borlabs.io/kb/google-tag-manager/#ch_3 However, I removed them to debug. They are not the issue.

But I am having the problem that the gtm4wp.orderCompletedEEC GA3 event does not contain any ecom purchase data – and therefore no transaction is created in GA3.

My trigger: https://imgur.com/VZadCQJ
My tag: https://imgur.com/s7TAZCu
Datalayer for gtm4wp.orderCompletedEEC event:

{
  event: "gtm4wp.orderCompletedEEC",
  gtm: {uniqueEventId: 13},
  visitorLoginState: "logged-in",
  visitorType: "administrator",
  pagePostType: "page",
  pagePostType2: "single-page",
  pagePostAuthor: "adminTZN",
  customerTotalOrders: 1,
  customerTotalOrderValue: "0.00",
  customerFirstName: "Franz",
  customerLastName: "Sauerstein",
  customerBillingFirstName: "Franz",
  customerBillingLastName: "Sauerstein",
  customerBillingCompany: "",
  customerBillingAddress1: "Musterstraße 123",
  customerBillingAddress2: "",
  customerBillingCity: "Musterstadt",
  customerBillingPostcode: "12345",
  customerBillingCountry: "DE",
  customerBillingEmail: "support@gtm4wp.com",
  customerBillingPhone: "004917663089857",
  customerShippingFirstName: "Franz",
  customerShippingLastName: "Sauerstein",
  customerShippingCompany: "",
  customerShippingAddress1: "Musterstraße 123",
  customerShippingAddress2: "",
  customerShippingCity: "Musterstadt",
  customerShippingPostcode: "12345",
  customerShippingCountry: "DE",
  cartContent: {
    totals: {
      applied_coupons: [],
      discount_total: 0,
      subtotal: 0,
      total: 0
    },
    items: []
  },
  orderData: {
    attributes: {
      date: "2021-10-19T09:47:02+00:00",
      order_number: "47588",
      order_key: "wc_order_8xJ0AdUIBPI3L",
      payment_method: "",
      payment_method_title: "",
      shipping_method: "Versandkostenfrei",
      status: "processing",
      coupons: "testing100"
    },
    totals: {
      currency: "EUR",
      discount_total: "23.81",
      discount_tax: "1.6667",
      shipping_total: "0",
      shipping_tax: "0",
      cart_tax: "-0.000434",
      total: "0.00",
      total_tax: "0",
      total_discount: "23.81",
      subtotal: "23.8",
      tax_totals: {
        DE-MWST. DE REDUZIERTER-PREIS-1: {
          amount: -0.000434,
          id: 23088,
          rate_id: 34,
          is_compound: false,
          label: "MwSt. DE reduzierter-preis",
          formatted_amount: "<span class=\"woocommerce-Price-amount a" +
                            "mount\"><bdi>-0,00<span class=\"woocomme" +
                            "rce-Price-currencySymbol\">&euro;</span>" +
                            "</bdi></span>"
        }
      }
    },
    customer: {
      id: 7779,
      billing: {
        first_name: "Franz",
        last_name: "Sauerstein",
        company: "",
        address_1: "Musterstraße 123",
        address_2: "",
        city: "Musterstadt",
        state: "",
        postcode: "12345",
        country: "DE",
        email: "support@gtm4wp.com",
        phone: "004917663089857"
      },
      shipping: {
        first_name: "Franz",
        last_name: "Sauerstein",
        company: "",
        address_1: "Musterstraße 123",
        address_2: "",
        city: "Musterstadt",
        state: "",
        postcode: "12345",
        country: "DE"
      }
    },
    items: [
      {
        id: "2512",
        name: "Luxus-Nuss Bruchschokolade",
        sku: "2512",
        category: "Bruchschokolade",
        price: 0,
        stocklevel: 10,
        quantity: 1
      },
      {
        id: "2109",
        name: "Schokotafel Vollmilch Cappuccino",
        sku: "2109",
        category: "Vollmilchschokolade",
        price: 0,
        stocklevel: 0,
        quantity: 1
      },
      {
        id: "4050",
        name: "Schoko-Teddy groß -personalisierbar-",
        sku: "4050",
        category: "personalisierte Schokolade",
        price: 0,
        stocklevel: -1,
        quantity: 1
      }
    ]
  },
  ecommerce: {
    currencyCode: "EUR",
    purchase: {
      actionField: {
        id: "47588",
        affiliation: "",
        revenue: 0,
        tax: 0,
        shipping: 0,
        coupon: "testing100"
      },
      products: [
        {
          id: "2512",
          name: "Luxus-Nuss Bruchschokolade",
          sku: "2512",
          category: "Bruchschokolade",
          price: 0,
          stocklevel: 10,
          quantity: 1
        },
        {
          id: "2109",
          name: "Schokotafel Vollmilch Cappuccino",
          sku: "2109",
          category: "Vollmilchschokolade",
          price: 0,
          stocklevel: 0,
          quantity: 1
        },
        {
          id: "4050",
          name: "Schoko-Teddy groß -personalisierbar-",
          sku: "4050",
          category: "personalisierte Schokolade",
          price: 0,
          stocklevel: -1,
          quantity: 1
        }
      ]
    }
  }
}

The GA3 tag is firing upon the gtm4wp.orderCompletedEEC event: https://imgur.com/6XLkuf1
I am seeing the events in Google Analytics, but not the revenue in eCommerce Tracking: https://imgur.com/0uEUiQE

The page: https://bengelmann.com/
GA debug link: https://tagassistant.google.com/#/?id=GTM-5LKBH46&url=https%3A%2F%2Fbengelmann.com%2F%3Fgtm_debug%3D1634628391828&source=TAG_MANAGER&gtm_auth=gUj-2FB3AFryFUDDQMFk8A&gtm_preview=env-46

How to place an order without paying: Use email adress support@gtm4wp.com, PW %@j6t*sddNC5wbHPPyehhlgs and coupon code TESTING100.

I currently run Google Analytics WooCommerce Tracking in parallel, because I need to track orders.

Thank you for taking a look!

The page I need help with: [log in to see the link]