Hello, roshanbade221, did you find any ways on how to add message button in CallKit UI?

Hello myusuf6716, Did you resolve this issue? I am facing the same crash, but can not reproduce it by myself.

Hello, Thank you for quick response, I have opened a bug report: FB16109883

I want to share that I had exactly the same crash description, but my issue was related to NSFetchedResultsControllerDelegate. After refactoring, issue disappeared. I hope it may help some of us who trying to find the root case. Best way to debug is to enable Exception Breakpoint. Crash was called in this function inside the batch update. Worked fine on Xcode 15, but crashes on Xcode 16. func controllerDidChangeContent(_ controller: NSFetchedResultsController<NSFetchRequestResult>) { collectionView?.performBatchUpdates({ //crash was here }, completion: { [weak self] finished in //completion }) } }