Push notifications received only for a moment

I'm using Azure Notification Hub and have a cordova based application (ionic). Everything works fine for iOS < 13. For iOS 13 I started experiencing some strange behaviors.

- When using sandbox all is fine

- when using production only first few messages are received. Then the users don't get any notifications. If they relog to app then they can have notifications for some times.


Tried bodies with:

{ "aps": { "alert": "notification message" }}

or

{"aps": { "alert": { "title":"test", "body":"notification message" }}}

I'm adding headers:

{ "content-available", "0"},

{"apns-push-type", "alert" },

{ "apns-priority", "10" }