Hi,
In the past 2 weeks I'm experiencing issue with APNs.
The deviceToken was invalidated after only 2-3 days.
Here's the steps I did to test this:
1. Open app
2. Get deviceToken
3. Close app
4. Send push notification (works)
5. Wait 2-3 days
6. Send push notification (no longer works)
7. Reopen app
8. deviceToken is refreshed with a new token
This is really frustrating because we can't expect users to open the app everyday.
We used to have the token valid for 1-2 months. All certificates are still valid.