We are experiencing the same problem. Would appreciate documentation on what we are supposed to do.
Documentation for the new header -
We are in the process of seeing if 'voip' really works, or just anything other than "alert" or "background" works...
We are facing the same problem with VOIP notifications.
After a conf call with Apple developers, they admit some content was missing on their documentation.
Also, AWS is not aware of this problem on SNS services, and we can't set the "voip" header as needed
It appears that alert style notifications work fine without this new apns-push-type parameter but silent notifications do Not get delivered either with or without this.
This is a pretty bad problem for my application.