Audio not workin when using alongside Zoom Video SDK. Getting "AURemoteIO.cpp:1091 failed: 561017449" error

[wanvidu]

• Audio start working after around 40 seconds delay

• Outgoing calls working normally. For this "flutter_callkit_incoming" not used. So issue is not in the Zoom video SDK

• Getting same issue with both Zoom Video SDK and Agora

• Android to Android working normally. iOS to Android and iOS to iOS not working

• showCallkitIncoming called with configureAudioSession = false and audioSessionActive = false

        let data = flutter_callkit_incoming.Data(
                    id: id,
                    nameCaller: callerUserUsername,
                    handle: "",
                    type: callType == "VIDEO" ? 1 : 0
                  )
        
        data.configureAudioSession = false
        data.audioSessionActive = false

        data.extra = [
            "appointmentType": appointmentType,
            "appointmentId": appointmentId,
        ]

        SwiftFlutterCallkitIncomingPlugin.sharedInstance?.showCallkitIncoming(data, fromPushKit: true)

• WebRTC manual audio set

import UIKit
import CallKit
import AVFAudio
import PushKit
import Flutter
import flutter_callkit_incoming
import WebRTC

@main
@objc class AppDelegate: FlutterAppDelegate, PKPushRegistryDelegate, CallkitIncomingAppDelegate {

    override func application(
        _ application: UIApplication,
        didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?
    ) -> Bool {
        GeneratedPluginRegistrant.register(with: self)

        //Setup VOIP
        let mainQueue = DispatchQueue.main
        let voipRegistry: PKPushRegistry = PKPushRegistry(queue: mainQueue)
        voipRegistry.delegate = self
        voipRegistry.desiredPushTypes = [PKPushType.voIP]

        //Use if using WebRTC
        RTCAudioSession.sharedInstance().useManualAudio = true
        RTCAudioSession.sharedInstance().isAudioEnabled = false

        if #available(iOS 10.0, *) {
          UNUserNotificationCenter.current().delegate = self as? UNUserNotificationCenterDelegate
        }

        return super.application(application, didFinishLaunchingWithOptions: launchOptions)
    }

    // Handle updated push credentials
    func pushRegistry(_ registry: PKPushRegistry, didUpdate credentials: PKPushCredentials, for type: PKPushType) {
        print(credentials.token)
        let deviceToken = credentials.token.map { String(format: "%02x", $0) }.joined()
        print(deviceToken)
        //Save deviceToken to your server
        SwiftFlutterCallkitIncomingPlugin.sharedInstance?.setDevicePushTokenVoIP(deviceToken)
    }

    func pushRegistry(_ registry: PKPushRegistry, didInvalidatePushTokenFor type: PKPushType) {
        print("didInvalidatePushTokenFor")
        SwiftFlutterCallkitIncomingPlugin.sharedInstance?.setDevicePushTokenVoIP("")
    }

    // Handle incoming pushes
    func pushRegistry(_ registry: PKPushRegistry, didReceiveIncomingPushWith payload: PKPushPayload, for type: PKPushType, completion: @escaping () -> Void) {
        print("didReceiveIncomingPushWith")
        guard type == .voIP else { return }

        let id = UUID().uuidString
        let appointmentType = payload.dictionaryPayload["appointment_type"] as? String ?? ""
        let appointmentId = payload.dictionaryPayload["appointment_id"] as? String ?? ""
        let callType = payload.dictionaryPayload["call_type"] as? String ?? "VIDEO"

        let data = flutter_callkit_incoming.Data(
                    id: id,
                    nameCaller: "User",
                    handle: "",
                    type: callType == "VIDEO" ? 1 : 0
                  )
        
        data.configureAudioSession = false
        data.audioSessionActive = false

        data.extra = [
            "appointmentType": appointmentType,
            "appointmentId": appointmentId,
        ]

        SwiftFlutterCallkitIncomingPlugin.sharedInstance?.showCallkitIncoming(data, fromPushKit: true)

        //Make sure call completion()
        DispatchQueue.main.asyncAfter(deadline: .now() + 1) {
            completion()
        }
    }

    // Func Callback Toggle Audio Session
    func didActivateAudioSession(_ audioSession: AVAudioSession) {
        //Use if using WebRTC
        RTCAudioSession.sharedInstance().audioSessionDidActivate(audioSession)
        RTCAudioSession.sharedInstance().isAudioEnabled = true
    }

    // Func Callback Toggle Audio Session
    func didDeactivateAudioSession(_ audioSession: AVAudioSession) {
        //Use if using WebRTC
        RTCAudioSession.sharedInstance().audioSessionDidDeactivate(audioSession)
        RTCAudioSession.sharedInstance().isAudioEnabled = false
    }
}

• Error log

CreateAudioUnit use hardware aec = 1
[IOS].CreateAudioUnit g_audioUinits.count = 1
AudioDeviceIOS::SetMuteOutputAudioUnit unmute output
AudioDeviceIOS::SetMuteOutputAudioUnit can mute = 1
           AURemoteIO.cpp:1091  failed: 561017449 (enable 3, outf< 1 ch,  48000 Hz, Int16> inf< 1 ch,  48000 Hz, Int16>)
AudioDeviceIOS::SetMuteOutputAudioUnit can mute = 1
AudioDeviceIOS::SetMuteOutputAudioUnit unmute output
flutter: ##############################
flutter: FlutterCallkitIncoming: Event.actionCallToggleMute
flutter: CallEvent( body: {isMuted: true, id: D4E1367F-1ECE-427C-94D1-F4DB319CA5CF}, event: Event.actionCallToggleMute)
flutter: ##############################
flutter: FlutterCallkitIncoming: Event.actionCallToggleMute
flutter: CallEvent( body: {isMuted: false, id: D4E1367F-1ECE-427C-94D1-F4DB319CA5CF}, event: Event.actionCallToggleMute)
flutter: ##############################
AudioDeviceIOS::SetMuteOutputAudioUnit unmute output
           AURemoteIO.cpp:1091  failed: 561017449 (enable 3, outf< 1 ch,  48000 Hz, Int16> inf< 1 ch,  48000 Hz, Int16>)
flutter: ##############################
flutter: FlutterCallkitIncoming: Event.actionCallToggleMute
flutter: CallEvent( body: {id: D4E1367F-1ECE-427C-94D1-F4DB319CA5CF, isMuted: false}, event: Event.actionCallToggleMute)
flutter: ##############################
flutter: FlutterCallkitIncoming: Event.actionCallToggleMute
flutter: CallEvent( body: {id: D4E1367F-1ECE-427C-94D1-F4DB319CA5CF, isMuted: false}, event: Event.actionCallToggleMute)
flutter: ##############################
AudioDeviceIOS::SetMuteOutputAudioUnit unmute output
           AURemoteIO.cpp:1091  failed: 561017449 (enable 3, outf< 1 ch,  48000 Hz, Int16> inf< 1 ch,  48000 Hz, Int16>)
AudioDeviceIOS::SetMuteOutputAudioUnit unmute output
           AURemoteIO.cpp:1091  failed: 561017449 (enable 3, outf< 1 ch,  48000 Hz, Int16> inf< 1 ch,  48000 Hz, Int16>)
AudioDeviceIOS::SetMuteOutputAudioUnit unmute output
           AURemoteIO.cpp:1091  failed: 561017449 (enable 3, outf< 1 ch,  48000 Hz, Int16> inf< 1 ch,  48000 Hz, Int16>)
AudioDeviceIOS::SetMuteOutputAudioUnit unmute output
           AURemoteIO.cpp:1091  failed: 561017449 (enable 3, outf< 1 ch,  48000 Hz, Int16> inf< 1 ch,  48000 Hz, Int16>)
AudioDeviceIOS::SetMuteOutputAudioUnit unmute output
           AURemoteIO.cpp:1091  failed: 561017449 (enable 3, outf< 1 ch,  48000 Hz, Int16> inf< 1 ch,  48000 Hz, Int16>)
AudioDeviceIOS::SetMuteOutputAudioUnit unmute output
           AURemoteIO.cpp:1091  failed: 561017449 (enable 3, outf< 1 ch,  48000 Hz, Int16> inf< 1 ch,  48000 Hz, Int16>)
AudioDeviceIOS::SetMuteOutputAudioUnit unmute output
           AURemoteIO.cpp:1091  failed: 561017449 (enable 3, outf< 1 ch,  48000 Hz, Int16> inf< 1 ch,  48000 Hz, Int16>)
LOG: onEnd
flutter: ##############################
flutter: FlutterCallkitIncoming: Event.actionCallEnded
flutter: CallEvent( body: {uuid: d4e1367f-1ece-427c-94d1-f4db319ca5cf, duration: 30000, type: 1, normalHandle: 0, extra: {appointmentType: TRAINING, receiverUserId: 836, callerUserId: 203, zoomSessionPassword: IZQIVcDTTh, callType: VIDEO, zoomSessionName: UgTeyJrLmG, appointmentId: 3}, id: d4e1367f-1ece-427c-94d1-f4db319ca5cf, ios: {supportsHolding: true, audioSessionPreferredIOBufferDuration: 0.005, supportsGrouping: true, audioSessionPreferredSampleRate: 44100.0, supportsUngrouping: true, audioSessionActive: false, supportsVideo: true, supportsDTMF: true, audioSessionMode: videoChat, ringtonePath: , handleType: , includesCallsInRecents: true, configureAudioSession: false, iconName: CallKitLogo, maximumCallsPerCallGroup: 1, maximumCallGroups: 2}, handle: , appName: PetDoc, nameCaller: User}, event: Event.actionCallEnded)
flutter: ##############################
AudioDeviceIOS::SetMuteOutputAudioUnit unmute output
AudioDeviceIOS::SetMuteOutputAudioUnit can mute = 1
[IOS].InitAudioUnit kAUVoiceIOSpeechActivityHasStarted notification report}

Expected Behavior:

• Call alert shown via "flutter_callkit_incoming" which is coming from CallKit
• When Accept button is pressed open call screen which contains code for initializing Zoom Video SDK
• Audio should start working immediately after connecting to Zoom

Actual Behavior:

• Call alert shown via "flutter_callkit_incoming" which is coming from CallKit
• When Accept button is pressed open call screen which contains code for initializing Zoom Video SDK
• Audio connects after around 40 seconds delay

Environment:
• iOS version: 18.2
• Flutter version: 3.27.4
• flutter_callkit_incoming plugin version: 2.5.0
• Device: iPhone 11