diff --git a/Assets/MagnetismHeroes/Tests/PlayMode/ContentPlayTests.cs b/Assets/MagnetismHeroes/Tests/PlayMode/ContentPlayTests.cs
index 5d20ef0..aa285cb 100644
--- a/Assets/MagnetismHeroes/Tests/PlayMode/ContentPlayTests.cs
+++ b/Assets/MagnetismHeroes/Tests/PlayMode/ContentPlayTests.cs
@@ -154,6 +154,26 @@ namespace MagnetismHeroes.Tests
             Assert.That(_app.Presenter.Balls.Values.Where(ball=>ball.Hinted).Select(ball=>ball.BallId), Is.EquivalentTo(hint.BallIds));
             Assert.That(_app.Voice.CurrentClipId, Is.EqualTo(hint.VoiceId));
         }
+        [UnityTest] public IEnumerator CollectingCurrentHelpTargetCancelsOldFindGuideWithoutLosingNumberQueue()
+        {
+            _app.StartStage(3); yield return null; _app.ShowHelp(); var hint=_app.Session.Hint;
+            Assert.That(_app.Voice.CurrentClipId, Is.EqualTo("guide_find"));
+            _app.CommitMove(hint.FirstGroupId,new Position3(.1f,0,0));
+            Assert.That(_app.Voice.CurrentClipId, Is.Null,"Committed collection invalidates that old target guide.");
+            _app.StartStage(2); var groups=_app.Session.Board.Groups;
+            _app.CommitMove(groups[0].id,new Position3(.1f,0,0),groups[1].id); _app.CountBall(_app.Session.Board.Balls[0].id);
+            _app.ShowHelp(); int pending=_app.Voice.PendingCount;
+            _app.CommitMove(_app.Session.Board.Groups[0].id,new Position3(.1f,0,0));
+            Assert.That(_app.Voice.PendingCount, Is.EqualTo(pending)); Assert.That(_app.Voice.CurrentClipId, Is.EqualTo("count_01"));
+        }
+        [UnityTest] public IEnumerator SuccessfulCurrentHelpMergeCancelsCompositionGuideInSameFreeBoard()
+        {
+            _app.StartStage(7); yield return null; _app.ShowHelp(); var hint=_app.Session.Hint;
+            Assert.That(_app.Voice.CurrentClipId, Is.EqualTo("guide_merge"));
+            _app.CommitMove(hint.FirstGroupId,new Position3(.1f,0,0),hint.SecondGroupId);
+            Assert.That(_app.Session.Screen, Is.EqualTo(SessionScreen.FreePlay));
+            Assert.That(_app.Voice.CurrentClipId, Is.Null,"Successful merge cannot retain the obsolete composition guide.");
+        }
     }
 }
 #endif
diff --git a/Assets/MagnetismHeroes/UnityRuntime/Bootstrap/GameApp.cs b/Assets/MagnetismHeroes/UnityRuntime/Bootstrap/GameApp.cs
index f16d40a..7cbc259 100644
--- a/Assets/MagnetismHeroes/UnityRuntime/Bootstrap/GameApp.cs
+++ b/Assets/MagnetismHeroes/UnityRuntime/Bootstrap/GameApp.cs
@@ -139,6 +139,7 @@ namespace MagnetismHeroes.UnityRuntime.Bootstrap
         public void CommitMove(string groupId, Position3 delta, string mergeTarget = null)
         {
             var result = mergeTarget == null ? Session.MoveGroup(groupId, delta) : Session.MoveAndMerge(groupId, delta, mergeTarget);
+            if (result.Accepted) _voice.CancelGuide();
             Refresh(false);
             if (result.Accepted && Session.Screen == SessionScreen.Puzzle && Session.Board.CanCount) _voice.Guide("guide_count");
         }