diff --git a/Assets/Hangman/Scenes/Hangman.unity b/Assets/Hangman/Scenes/Hangman.unity
index 55011fb..756f0d5 100644
--- a/Assets/Hangman/Scenes/Hangman.unity
+++ b/Assets/Hangman/Scenes/Hangman.unity
@@ -6569,22 +6569,6 @@ GameObject:
   m_NavMeshLayer: 0
   m_StaticEditorFlags: 0
   m_IsActive: 1
---- !u!114 &5233312447513285388
-MonoBehaviour:
-  m_ObjectHideFlags: 0
-  m_CorrespondingSourceObject: {fileID: 0}
-  m_PrefabInstance: {fileID: 0}
-  m_PrefabAsset: {fileID: 0}
-  m_GameObject: {fileID: 5233312447513285390}
-  m_Enabled: 0
-  m_EditorHideFlags: 0
-  m_Script: {fileID: 11500000, guid: 44e682a32ee15cc489bf50f3a06f717b, type: 3}
-  m_Name: 
-  m_EditorClassIdentifier: 
-  feedbackText: {fileID: 0}
-  feedbackProgress: {fileID: 0}
-  feedbackProgressImage: {fileID: 0}
-  signPredictor: {fileID: 1991376311}
 --- !u!224 &5233312447513285389
 RectTransform:
   m_ObjectHideFlags: 0
@@ -6616,7 +6600,6 @@ GameObject:
   serializedVersion: 6
   m_Component:
   - component: {fileID: 5233312447513285389}
-  - component: {fileID: 5233312447513285388}
   m_Layer: 5
   m_Name: Feedback
   m_TagString: Untagged
diff --git a/Assets/MediaPipeUnity/Interfaces/Listener.cs b/Assets/MediaPipeUnity/Interfaces/Listener.cs
index 644a1e7..24f4037 100644
--- a/Assets/MediaPipeUnity/Interfaces/Listener.cs
+++ b/Assets/MediaPipeUnity/Interfaces/Listener.cs
@@ -4,5 +4,5 @@ using UnityEngine;
 
 public interface Listener
 {
-    public void ProcessIncomingCall();
+    public IEnumerator ProcessIncomingCall();
 }
diff --git a/Assets/MediaPipeUnity/Scripts/AbstractFeedback.cs b/Assets/MediaPipeUnity/Scripts/AbstractFeedback.cs
index 95e4619..65bdda8 100644
--- a/Assets/MediaPipeUnity/Scripts/AbstractFeedback.cs
+++ b/Assets/MediaPipeUnity/Scripts/AbstractFeedback.cs
@@ -47,10 +47,10 @@ public abstract class AbstractFeedback : MonoBehaviour, Listener
     /// </summary>
     protected string previousIncorrectSign = null;
 
-    public void ProcessIncomingCall()
+    public IEnumerator ProcessIncomingCall()
     {
         //UpdateFeedback2();
-        StartCoroutine(UpdateFeedback());
+        yield return StartCoroutine(UpdateFeedback());
     }
 
     public void AddSelfAsListener()
diff --git a/Assets/MediaPipeUnity/Scripts/SignPredictor.cs b/Assets/MediaPipeUnity/Scripts/SignPredictor.cs
index 8a95555..80420f5 100644
--- a/Assets/MediaPipeUnity/Scripts/SignPredictor.cs
+++ b/Assets/MediaPipeUnity/Scripts/SignPredictor.cs
@@ -326,7 +326,7 @@ namespace Mediapipe.Unity.Tutorial
                     //Debug.Log($"prob = [{learnableProbabilities.Aggregate("   ", (t, kv) => $"{t}{kv.Key}:{kv.Value}   ")}]");
                     foreach(Listener listener in listeners)
                     {
-                        listener.ProcessIncomingCall();
+                        yield return listener.ProcessIncomingCall();
                     }
                 }
                 else
diff --git a/Assets/SpellingBee/Scripts/GameController.cs b/Assets/SpellingBee/Scripts/GameController.cs
index 61be88c..3ca0c2c 100644
--- a/Assets/SpellingBee/Scripts/GameController.cs
+++ b/Assets/SpellingBee/Scripts/GameController.cs
@@ -491,7 +491,7 @@ public partial class GameController : AbstractFeedback
                     // Correct sign
                     if (predictedSign == currentSign)
                     {
-                        //yield return new WaitForSeconds(1.0f);
+                        yield return new WaitForSeconds(1.0f);
                         predictSign(predictedSign);
                         timer = DateTime.Now;
                         predictedSign = null;
@@ -505,7 +505,7 @@ public partial class GameController : AbstractFeedback
                             timer = DateTime.Now;
                             previousIncorrectSign = predictedSign;
                         }
-                        else if (DateTime.Now - timer > TimeSpan.FromSeconds(4.0f))
+                        else if (DateTime.Now - timer > TimeSpan.FromSeconds(2.0f))
                         {
                             predictSign(predictedSign);
                             timer = DateTime.Now;