Update 10/08: xMatters for iOS 2.7.1 includes a simpler workaround to this issue. Just update to the latest version of xMatters app, and launch it once you've upgraded to iOS 8.
For users running xMatters for iOS 2.7 or lower, the following steps are still required to re-register for push notifications in iOS 8.
This article describes how to ensure that you receive push notifications after upgrading your Apple device to iOS 8. For a complete description of the issue, see this article.
After upgrading your iPhone's operating system to iOS 8, log out of the xMatters app, log back in, and and verify the push notification and custom sound settings.
- Click the gear icon to access your settings page.
- Log out.
- Log back in to the xMatters app.
- Click the gear icon to access your Settings page.
- Verify that push messages are turned on and your custom sound is selected.