iOS Speech Reset With Different Language

Question

I have a current speech recognition capture that works nicely - you say what you would like, and it get's it. Fairly accurate too for what it's worth...

The issue I'm having is such:

• If I attempt to change languages after stopping and starting, it fails with the following errors

  2018-05-23 00:51:51.878921-0400 APP[1237:332833] Speech error: The operation couldn’t be completed. (kAFAssistantErrorDomain error 209.)
  2018-05-23 00:51:51.922965-0400 APP[1237:332833] Speech error: Corrupt
  

However, if I stop recording and reset with the original language, it will work just fine. For instance, even starting with Korean, any time I stop, switch to... Korean... then press start again, it works. No matter how many times I do this process.

The issue is, continuing my example, if I switch to a different language, EVEN English, after starting with Korean, it gives me that error (which is contained in my recognitionTaskWithRequest FYI).

It appears the starting language is irrelevant to whether it will work, just as long as I choose a different language it fails, and when I select the same starting language it works.

    // Note: self.inputLanguageIdentifier is changed when you select a new language.
    // I have tested to ensure this ID is correct each time.
    // I.E. Korean prints ko-KR, English of course en-US, etc.

    NSLocale *locale = [NSLocale alloc] initWithLocaleIdentifier:self.inputLanguageIdentifier]
    speechRecognizer = [[SFSpeechRecognizer alloc] initWithLocale:locale];

    speechRecognizer.delegate = self;


    recognitionRequest = [[SFSpeechAudioBufferRecognitionRequest alloc] init];
    AVAudioInputNode *inputNode = audioEngine.inputNode;
    recognitionRequest.shouldReportPartialResults = YES;


    recognitionTask = [speechRecognizer recognitionTaskWithRequest:recognitionRequest resultHandler:^(SFSpeechRecognitionResult * _Nullable result, NSError * _Nullable error) {
        BOOL isFinal = NO;
        if (result && !userDidTapCancel) {
            // in the console.
            NSLog(@"RESULT:%@", result.bestTranscription.formattedString);
            [self updateTextForResult:result.bestTranscription.formattedString];
            isFinal = !result.isFinal;
        }
        if (error) {
            NSLog(@"Speech error: %@", error.localizedDescription);
            [self stopListening];
        }
    }];

My stopListening is such:

- (void)stopListening {

    isListening = NO;

    [audioEngine stop];
    [recognitionRequest endAudio];
    [recognitionTask cancel];

}

UPDATE:

What I have found, is that upon resetting twice in a row (keeping the same newly selected language), the recording works as expected.

But as it stands I can't find a solution that allows it to work the first immediate time after changing languages... bizarre.