I'm experiencing the same thing too. I upgraded a 13 pro to iOS 17, and it was fine from what I recall. Now on my new 15 PM, I'm getting very inconsistent notification haptics/sounds. Even when the phone is unlocked the banners show up inconsistently, and the vibrations are inconsistent as well.Since I updated I have a problem. Many notifications (especially those from third parties) do not vibrate. When I receive a notification it does not vibrate (it happens with some apps). The same thing happens on the Apple Watch. I have vibration mode set to sound. The screen also doesn't turn on when I receive the notification. They are silent notifications.