Intermittent failed payments

We upgraded WooCommerce PayPal Checkout Gateway to PayPal Payments (v1.6.2) and are experiencing about 45% failed payments now. The end users sees the message “Something went wrong. Please try again or choose another payment source.” This message is displayed when they’ve tried PayPal or Credit and Debit Card options, different browsers, re-logging in and even clearing their browser cache and cookies.

Per PayPal support I’ve installed the Rest API Log plugin (v1.6.8) and we’re seeing 45% of our /paypal/v1/incoming transactions fail with this type of message:

{
    "data": {
        "success": false,
        "message": "No order for webhook event WH-6WL84154KK2934839-3DA91405E89662808 was found."
    },
    "headers": {
        "Allow": "POST"
    },
    "status": 200
}

Here is what a successful payment looks like:

{
    "data": {
        "success": true
    },
    "headers": {
        "Allow": "POST"
    },
    "status": 200
}

We were contacted by PayPal [email] and also followed WooCommerce’s recommendation to upgrade this plugin since it was retired. I called the PayPal integration team and they walked me through all the PayPal Checkout settings and the PayPal Card Processing settings.

Our only workaround at this point is to enroll people in their online course and manually send them a PayPal invoice. How can we resolve this?

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