IssueTracker

Stacktrace:
```
java.util.ConcurrentModificationException
        at java.util.ArrayList$Itr.checkForComodification(ArrayList.java:1029)
        at java.util.ArrayList$Itr.next(ArrayList.java:982)
        at androidx.fragment.app.FragmentManager.handleOnBackPressed(FragmentManager.java:828)
        at androidx.fragment.app.FragmentManager$1.handleOnBackPressed(FragmentManager.java:529)
        at androidx.activity.OnBackPressedDispatcher.onBackPressed(OnBackPressedDispatcher.kt:279)
        at androidx.activity.OnBackPressedDispatcher$3.invoke(OnBackPressedDispatcher.kt:130)
        at androidx.activity.OnBackPressedDispatcher$3.invoke(OnBackPressedDispatcher.kt:127)
        at androidx.activity.OnBackPressedDispatcher$Api34Impl$createOnBackAnimationCallback$1.onBackInvoked(OnBackPressedDispatcher.kt:395)
        at android.window.WindowOnBackInvokedDispatcher$OnBackInvokedCallbackWrapper.lambda$onBackInvoked$5(WindowOnBackInvokedDispatcher.java:378)
        at android.window.WindowOnBackInvokedDispatcher$OnBackInvokedCallbackWrapper.$r8$lambda$Yg9Ce5qkEkMu8Gnl0aIFMDgrwbc(Unknown Source:0)
        at android.window.WindowOnBackInvokedDispatcher$OnBackInvokedCallbackWrapper$$ExternalSyntheticLambda3.run(D8$$SyntheticClass:0)
        at android.os.Handler.handleCallback(Handler.java:959)
        at android.os.Handler.dispatchMessage(Handler.java:100)
        at android.os.Looper.loopOnce(Looper.java:232)
        at android.os.Looper.loop(Looper.java:317)
        at android.app.ActivityThread.main(ActivityThread.java:8501)
        at java.lang.reflect.Method.invoke(Native Method)
        at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:552)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:878)
```

Setup:
 - Android 34
 - opt-in to predictive back using `android:enableOnBackInvokedCallback="true"`
 - `androidx.fragment:fragment-ktx:1.7.1` as well as 1.8.0
 - `androidx.appcompat:appcompat:1.7.0`, `androidx.lifecycle:lifecycle-*:2.8.2`, `androidx.navigation:navigation-*:2.7.7`

Repro:
 - open a fragment
 - start navigation back gesture
 - while the gesture is in-progress (you can hold it), open a non-cancelable dialog fragment (for example by delaying showing it by half a second after the fragment is created)
 - stop the gesture navigation
 - dismiss the dialog fragment
 - navigate back using gesture
 - app crashes

I don't have a sample project and I'm not willing to spend time creating one