I noticed that if you have a service, for example, a delivery service, in a sale order line it will break the whole workflow. Status of the sale order will be left at sale order instead of being set to DONE despite having already received the payment and delivered the product.
Try this: #1 - Set a product as service #2 - Set to make to stock/make to order (doesn't really matter, it will break the workflow anyway) #3 - create a new order #4 - Add a simple product, add the delivery service #5 - confirm the order, receive the payment, deliver the product. #6 - Go to Sales Order and you will see status still being set to "Sales Order" and not "Done"
Repeat the above without the delivery service and you will see that it is now set to complete.
How do we fix this?