Always taken to "Review Order" after Paypal auth completes
When I buy off of eBay, I agree to what I want, go to Paypal, auth the transaction and back at eBay I'm told its done.
My Magento 2 site always takes me to a "Review Order" page, no matter if I'm using Paypal Express or Paypal Website Standard. If it matters, I'm still in the PP sandbox. I'd prefer not to have to review the order, but just have it complete. What have I missed please?