I have a problem with Magento 2, I have installed original magento without other modules and enable PayPal Express checkout with sandbox mode
step to reproduce
I place order with PayPal everything is ok. invoice auto created with paid status.
I ship order, Order status changed to Complete.
I use issue refund from PayPal website and use IPN to redirect to mysite.com/paypal/ipn/
In magento it created Credit Memo without status, Orders status not change to Closed, not have refund value in order Total
I was try on magento1, it worked well.
Thanks you for your answer