ios – Remote notification tap not handled when app is killed

I’m running into a problem with remote push notifications on iOS.

When the app is in background or inactive, tapping a notification correctly triggers:

userNotificationCenter(_:didReceive:withCompletionHandler:)

…but when the app is killed, tapping the notification launches the app, yet no delegate method fires and my tracking event never gets sent.

I’m using:

• SwiftUI @ main App

• @ UIApplicationDelegateAdaptor for the AppDelegate

• UNUserNotificationCenter delegate set manually

• FirebaseAppDelegateProxy disabled

• No SceneDelegate

I’ve tried:

• Checking launchOptions?[.remoteNotification] (not fired on iOS 15+)

• Adding application(_:continue:restorationHandler:)

• Preventing banners during launch (suggestion by chatGPT but made no difference)

Foreground + background tap handling works perfectly — only killed → tap → launch fails to deliver the payload. hell i can’t even see logging for that flow.

Some code i have:

class AppDelegate: UIResponder, UIApplicationDelegate, UNUserNotificationCenterDelegate {

    func application(
        _ application: UIApplication,
        didFinishLaunchingWithOptions launchOptions:[UIApplication.LaunchOptionsKey : Any]?
    ) -> Bool {
        
        UNUserNotificationCenter.current().delegate = self
        return true
    }

func userNotificationCenter(
        _ center: UNUserNotificationCenter,
        didReceive response: UNNotificationResponse,
        withCompletionHandler completionHandler: @escaping () -> Void
    ) {
        handleNotificationTap(response.notification.request.content.userInfo)
        completionHandler()
    }

    public func handleNotificationTap(_ userInfo: [AnyHashable : Any]) {   
        let id = userInfo["notification_id"]
        let notificationId = (id as? Int).map(String.init) ?? (id as? String)

        if let finalId = notificationId {
            Analytics.track("notification_opened", parameters: ["notification_id": finalId])
        } else {
            Analytics.track(
                "notificationTappedWithoutID",
                parameters: ["payload": userInfo]
            )
        }
    }

As you can see there should always be some event send, but currently i receive none. i also tried didReceiveRemoteNotification but that didn’t work either.

Any help would be appreciated. been looking in to this for a few nights now.