The invoice number is different on the invoice that the consumer receives by email than the one in the app.

I'm almost done with coffee order app I'm building for my client, but there is 1 thing that is still strange. I've connected mollie as a payment system. After completion of the purchase, mollie will send to woocommerce that there is a new order and that the customer has paid and woocommerce will send an invoice to the customer via email. I use a woocommerce rest api which is connected to the logged in user to get all of their recent orders. The strange thing is that the invoice number inside the app is right and the 1 on the invoice in the email is wrong. I don't know where to look or what to do. When someone orders via their website, they get the right invoice number on both sides.