Push notifications are being delayed by several hours

This sort of delay can usually be explained by using low priority pushes and/or the iPhone being on an unreliable network connection, where it cannot sustain a persistent connection to APNs.

If you believe these don't explain your problem, we have a pinned post on how to provide diagnostic information so we can check what might be the problem. Please read through the post If you need assistance debugging your push notification issues

and supply the requested detailed information for a notification request that was not received and we can take a look.

Argun Tekant /  DTS Engineer / Core Technologies