The possible reason could be there are duplicate entries causing the issue you’re experiencing. Let me help you with this matter.
To start with, I recommend diving into your WooCommerce and system logs. This is where you can spot any unusual check entries that be contributes to the problem. If you're not familiar with navigating these logs or require further assistance, don’t hesitate to reach out to WooCommerce support. They have the expertise to guide you through the process and set things right.