I am having this same issue with iOS 182. on Xcode 16.2. I have the same behaviour even when using a custom ringtone. let update = CXCallUpdate() update.supportsHolding = true update.supportsGrouping = true update.supportsUngrouping = true update.localizedCallerName = caller and static var providerConfiguration: CXProviderConfiguration = { let providerConfiguration = CXProviderConfiguration() providerConfiguration.maximumCallsPerCallGroup = 2 providerConfiguration.supportedHandleTypes = [.generic, .phoneNumber] return providerConfiguration }()

The behaviour I am seeing is that if the second incoming call is Cellular it beeps, but if the second call is also from my CallKit implementation there is no beep