Platform Notifications API - AuctionCheckoutComplete does not work

[flea-market-store]

Two days ago i was receiving AuctionCheckoutComplete Notifications, now, when a paid order is in my account. I don't receive any notification..

Can you tell me if is something wrong with Ebay notifications API!

https://developer.ebay.com/devzone/guides/features-guide/content/Notifications/Notif-AuctionCheckoutComplete.html

[sing-harv]

I am also getting this issue, did you manage to resolve it? can you help me with the resolution steps as well?