by Alan Brown.
It would be good to know who else is experiencing this, as we have exactly the same issue with our site - notifications were ok until a few weeks ago, now no push notifications on iOS (Android fine).
I have tried a new Airnotifier key, but no difference.
As you say, it is a bit of a 'black box' - not sure if it is a bug, or an issue with the Airnotifier service.
Echoing the request - any help would be appreciated!
(Our site is on Moodle 3.3.1)