AVSpeechSynthesizer works wrong with Russian language

Here is a simple app to demonstrate problem:

import SwiftUI
import AVFoundation

struct ContentView: View {
    var synthVM = SpeakerViewModel()

    var body: some View {
        VStack {
            Text("Hello, world!")
                .padding()
            HStack {
              Button("Speak") {
                  if self.synthVM.speaker.isPaused {
                      self.synthVM.speaker.continueSpeaking()
                } else {
                    self.synthVM.speak(text: "Привет на корабле! Кто это пришел к нам, чтобы посмотреть на это произведение?")
                }
              }
              Button("Pause") {
                  if self.synthVM.speaker.isSpeaking {
                      self.synthVM.speaker.pauseSpeaking(at: .word)
                }
              }
              Button("Stop") {
                  self.synthVM.speaker.stopSpeaking(at: .word)
              }
            }
        }
    }
}

struct ContentView_Previews: PreviewProvider {
    static var previews: some View {
        ContentView()
    }
}

class SpeakerViewModel: NSObject {
    var speaker = AVSpeechSynthesizer()
  
  override init() {
    super.init()
    self.speaker.delegate = self
  }
  
  func speak(text: String) {
    let utterance = AVSpeechUtterance(string: text)
      utterance.voice = AVSpeechSynthesisVoice(language: "ru")
    speaker.speak(utterance)
  }
}

extension SpeakerViewModel: AVSpeechSynthesizerDelegate {
  func speechSynthesizer(_ synthesizer: AVSpeechSynthesizer, didStart utterance: AVSpeechUtterance) {
    print("started")
  }

  func speechSynthesizer(_ synthesizer: AVSpeechSynthesizer, didPause utterance: AVSpeechUtterance) {
    print("paused")
  }

  func speechSynthesizer(_ synthesizer: AVSpeechSynthesizer, didContinue utterance: AVSpeechUtterance) {}
  func speechSynthesizer(_ synthesizer: AVSpeechSynthesizer, didCancel utterance: AVSpeechUtterance) {}
  func speechSynthesizer(_ synthesizer: AVSpeechSynthesizer, willSpeakRangeOfSpeechString characterRange: NSRange, utterance: AVSpeechUtterance) {
      guard let rangeInString = Range(characterRange, in: utterance.speechString) else { return }
      print("Will speak: \(utterance.speechString[rangeInString])")
  }
  func speechSynthesizer(_ synthesizer: AVSpeechSynthesizer, didFinish utterance: AVSpeechUtterance) {
    print("finished")
  }
}

On simulator all works fine, but on real device there are many strange words appears in synthesis speak.

And willSpeakRangeOfSpeechString output is different on simulator and real device

Simulator:

started
Will speak: Привет
Will speak: на
Will speak: корабле!
Will speak: Кто
Will speak: это
Will speak: пришел
Will speak: к
Will speak: нам,
Will speak: чтобы
Will speak: посмотреть
Will speak: на
Will speak: это
Will speak: произведение?
finished

iPhone output have errors:

2021-10-12 17:09:32.613273+0300 VoiceTest[9027:203522] [AXTTSCommon] Broken user rule: \b([234567890]+)2 (мили|кварты|чашки|{столовых }ложки)(?=$|\s|[[:punct:]»\xa0]) > Error Domain=NSCocoaErrorDomain Code=2048 "The value “\b([234567890]+)2 (мили|кварты|чашки|{столовых }ложки)(?=$|\s|[[:punct:]»\xa0])” is invalid." UserInfo={NSInvalidValue=\b([234567890]+)2 (мили|кварты|чашки|{столовых }ложки)(?=$|\s|[[:punct:]»\xa0])}

2021-10-12 17:09:32.613548+0300 VoiceTest[9027:203522] [AXTTSCommon] Broken user rule: \b(1\d+)2 (мили|кварты|чашки|{столовых }ложки)(?=$|\s|[[:punct:]»\xa0]) > Error Domain=NSCocoaErrorDomain Code=2048 "The value “\b(1\d+)2 (мили|кварты|чашки|{столовых }ложки)(?=$|\s|[[:punct:]»\xa0])” is invalid." UserInfo={NSInvalidValue=\b(1\d+)2 (мили|кварты|чашки|{столовых }ложки)(?=$|\s|[[:punct:]»\xa0])}

2021-10-12 17:09:32.613725+0300 VoiceTest[9027:203522] [AXTTSCommon] Broken user rule: \b2 (мили|кварты|чашки|{столовых }ложки)(?=$|\s|[[:punct:]»\xa0]) > Error Domain=NSCocoaErrorDomain Code=2048 "The value “\b2 (мили|кварты|чашки|{столовых }ложки)(?=$|\s|[[:punct:]»\xa0])” is invalid." UserInfo={NSInvalidValue=\b2 (мили|кварты|чашки|{столовых }ложки)(?=$|\s|[[:punct:]»\xa0])}

started

Will speak: Привет

Will speak: на 

Will speak: ивет на корабле!

Will speak: Кто

Will speak: это 

Will speak: Кто это пришел

Will speak: к

Will speak: нам,

Will speak: чтобы

Will speak: посмотреть

Will speak: на 

Will speak: реть на это

Will speak:  на это произведение?

finished

Error appears on iOS / iPadOS 15.0, 15.0.1, 15.0.2, 14.7 But all works fine on 14.8

Looks like engine error. How to fix that issue?