WooCommerce Placed Order events stopped syncing after plan downgrade – Missing webhooks

Hello Klaviyo Team,

We are experiencing a persistent WooCommerce integration issue on sobrestore.com.

The issue started around April 30 / May 1, 2026, coinciding with our downgrade from a paid Klaviyo subscription to the free plan.

Before that date, order synchronization worked correctly. During April, Klaviyo recorded €4,804.53 in total WooCommerce revenue.

Current situation:

• Started Checkout continues syncing normally, with new events every day.

• Placed Order and Ordered Product have not received any events since April 30, despite regular confirmed purchases in WooCommerce.

• The integration was found disabled and was re-enabled on October 15.

• On October 17, we successfully reauthenticated the integration, generating a new REST API key with Read/Write permissions.

• The official Klaviyo WooCommerce plugin (version 3.8.3) is active and reports a successful connection.

• No Klaviyo order.created or order.updated webhooks appear in WooCommerce.

• A controlled test order was placed and changed to Processing, but Klaviyo did not register the purchase.

• The Historical Data section reports synchronization as completed, but the missing orders have not been recovered.

• We found no specific Klaviyo blocks in the sampled Cloudflare security logs.

We need help with three questions:

1. Could the integration deactivation associated with the subscription downgrade have removed or disabled the original WooCommerce webhooks?

2. Why are the required webhooks and order synchronization not being restored after successful reauthentication?

3. Could a Klaviyo staff member investigate the backend synchronization status, API errors and possible recovery of the missing orders from May onward?

We have already completed extensive troubleshooting, including reauthentication, API permission checks and a controlled test order.

Our free plan does not provide access to human technical support, so we would greatly appreciate assistance from a Klaviyo specialist.

Thank you.