Notifications Are Also Faulty
Some users have also experienced issues with notifications in iOS 17. As it turns out, some notifications might not pop up like they should.
Likewise, if you have an Apple Watch, sometimes you might get notifications on your watch, and others you might get them on your iPhone.
There isn’t a quick solution that will work with all your apps — besides updating your iPhone, that is — but you can manually go to every app that’s causing an issue and turn the notifications off and back on.
To do this, go to Settings and scroll down to the bottom to find the app you want to try to fix. Then, select Notifications and disable Allow Notifications. Then, turn on Allow Notifications one more time.