Thank you. I have enabled debug mode (totally missed that on first look). And now trying to find the logs, I think I have one duplicate order so may have something to report back!
Thank you for your reply.
Here is a screengrab: https://snipboard.io/95W2eO.jpg. Ever few days there are a couple of orders that are duplicates. As you can see one of these orders were cancelled, the other is yet to be cancelled.
We are using Braintree Credit Card and not paypal, and I do not see any logging available for this.
The client has noticed that they do not get an email notification for this send duplicate transaction, but they see that Order ID and the funds being taken from the customer account twice. This is obviously a very big problem is they are having 3-4 orders refunded every few weeks.
Please let me know what other information I can provide.
Thank you