Since upgrading to iOS 9 on my iPhone 6+ I have been having trouble with notifications. I only get an audio notification about half the time, the banner or popup on the lock screen will appear but no tone or vibration. I also no longer get Facebook notifications for some reason. Last night I tried resetting all settings and re-enabling notifications in each app but they are still intermittent. I have also updated to 9.0.1 without any change. Anyone else having this issue?