AuctionCheckoutComplete notifications do not flow to application if user authorises through OAuth flow.
One of my eBay Merchant user has been using the application initially with Auth'n'Auth and notifications were flowing. Moved over to OAuth and notifications were still working. Last week had to. reset their password due to new eBay password requirements, all apps authorise got removed. Applied OAuth authentication with all entries from Auth Scope including (commerce.notification.subscription) but AuctionCheckoutComplete notifications stopped working.
We have now performed Auth'n'Auth again and AuctionCheckoutComplete notifications have started working.
So looks like OAuth is not fully compatible for authorising notifications to work correctly. Can someone please help, because if this does not work, I will have to maintain both authentication models and it is a painful process to do.