How to set DictationRecognizer.AutoSilenceTimeoutSeconds and InitialSilenceTimeoutSeconds?

Hi,

I'm using Windows.Speech.DictationRecognizer in my project and I need at least 1 minute waiting time for user's voice input.

I create the DictationRecognizer object as the following:

 m_DictationRecognizer = new DictationRecognizer()
         {
             InitialSilenceTimeoutSeconds = 60,
             AutoSilenceTimeoutSeconds = 60
         };

also tried:

 m_DictationRecognizer = new DictationRecognizer();
 m_DictationRecognizer.AutoSilenceTimeoutSeconds = 60;
 m_DictationRecognizer.InitialSilenceTimeoutSeconds = 60;

When I'm running the scene, after 15-16 seconds without voice input, the recording stops due to DictationRecognizer.DictationComplete event with DictationCompletionCause = Complete. Seems like the DictationRecognizer ignores the AutoSilenceTimeoutSeconds and InitialSilenceTimeoutSeconds parameters and apply the default values.

This is my code:

 using UnityEditor;
 using UnityEngine;
 using UnityEngine.UI;
 using UnityEngine.Windows.Speech;
 
 public class DictationScript : MonoBehaviour
 {
     [SerializeField]
     private Text m_Hypotheses;
 
     [SerializeField]
     private Text m_Recognitions;
 
     private DictationRecognizer m_DictationRecognizer;
 
 
 
     void Start()
     {
         m_DictationRecognizer = new DictationRecognizer()
         {
             AutoSilenceTimeoutSeconds = 60,
             InitialSilenceTimeoutSeconds = 60
         };
        
         m_DictationRecognizer.DictationResult += (text, confidence) =>
         {
             Debug.LogFormat("Dictation result: {0}", text);
             m_Recognitions.text += text + "\n";
         };
 
         m_DictationRecognizer.DictationHypothesis += (text) =>
         {
             Debug.LogFormat("Dictation hypothesis: {0}", text);
             m_Hypotheses.text += text;
         };
 
         m_DictationRecognizer.DictationComplete += (completionCause) =>
         {
             Debug.LogErrorFormat("Dictation completed : {0}.", completionCause);
         };
 
         m_DictationRecognizer.DictationError += (error, hresult) =>
         {
             Debug.LogErrorFormat("Dictation error: {0}; HResult = {1}.", error, hresult);
         };
 
         m_DictationRecognizer.Start();
     }
 }

Tested on versions: 2019.2.20, 2019.2.17, 2018.4.9.

Any help will be appreciated.