VOIP Notification Not Working to End Call in iOS 18.2 with Flutter CallKit Incoming

[rohit-saini3103]

I am facing an issue with handling VOIP notifications in my Flutter application when using the flutter_callkit_incoming plugin on iOS 18.2. Specifically, when I try to send a VOIP notification to end a call, the behavior is inconsistent, and the call does not get terminated as expected.

Steps to Reproduce:
1. Set up flutter_callkit_incoming with VOIP push notifications for incoming calls.
2. Send a VOIP push notification with the intent to end the call.
3. On iOS 18.2, the app doesn’t respond as expected, and the call remains active.

Expected Behavior:

When sending a VOIP notification to end a call, the app should properly respond by ending the call and dismissing the CallKit UI.

Actual Behavior:

The VOIP notification is received, but the app get crashed. and display a pop up of that crash.

Environment:
• iOS version: 18.2
• Flutter version: 3.24.4
• flutter_callkit_incoming plugin version: 2.0.4+2
• Device: iPhone 11