SpeechToText.listen throws ListenFailedException for fa_IR on iOS

[vieramason]

I'm experiencing an issue with the SpeechToText package when trying to listen for speech input with the locale fa_IR on iOS. The following exception is thrown:

flutter: [ERROR
/runtime/dart_vm_initializer.cc(41)] Unhandled Exception: Instance of 'ListenFailedException' #0 SpeechToText.listen (package
/speech_to_text.dart:465:7) #1 ActController.startListening (package
/features/act/presentation/controllers/act_controller.dart:365:5) [ERROR
/runtime/dart_vm_initializer.cc(41)] Unhandled Exception: TimeoutException after 0:00:30.000000: Future not completed

The issue only occurs on iOS with the locale fa_IR. It works perfectly fine on Android and Web with the locale fa_IR
and work on ios with local en_EN

Code Example

Here is the function where the error occurs:

void startListening() async {
  final lang = appDatabase.read('lang');
  final localeId = (lang == "fa") ? "fa_IR" : "en_EN";
  isLoading.value = true; 
  isListening.value = false;
  await speechToText.listen(
    onResult: onSpeechResult,
    listenFor: const Duration(seconds: 10),
    localeId: localeId,
    cancelOnError: false,
    partialResults: false,
    listenMode: ListenMode.confirmation,
  );
  isLoading.value = false; 
  isListening.value = true;
}


Steps to Reproduce
Use the speech_to_text package in a Flutter project.
Set the localeId parameter to fa_IR and call the SpeechToText.listen method on an iOS device.
Observe the error.


Environment
Flutter version: 3.24.3 
speech_to_text version: ^6.5.1
iOS version: 18
Device: simulator - iphone 16
Other Notes: This issue does not occur on Android or Web.