diff --git a/src/modules/launcher/PowerLauncher/MainWindow.xaml.cs b/src/modules/launcher/PowerLauncher/MainWindow.xaml.cs
index 74217db0bc..5d24b77631 100644
--- a/src/modules/launcher/PowerLauncher/MainWindow.xaml.cs
+++ b/src/modules/launcher/PowerLauncher/MainWindow.xaml.cs
@@ -336,8 +336,9 @@ namespace PowerLauncher
         {
             var textBox = (TextBox)sender;
             var text = textBox.Text;
+            var autoCompleteText = SearchBox.AutoCompleteTextBlock.Text;
 
-            if (string.IsNullOrEmpty(text))
+            if (MainViewModel.ShouldAutoCompleteTextBeEmpty(text, autoCompleteText))
             {
                 SearchBox.AutoCompleteTextBlock.Text = string.Empty;
             }
diff --git a/src/modules/launcher/PowerLauncher/ViewModel/MainViewModel.cs b/src/modules/launcher/PowerLauncher/ViewModel/MainViewModel.cs
index bec5b2fe3f..195a51a23b 100644
--- a/src/modules/launcher/PowerLauncher/ViewModel/MainViewModel.cs
+++ b/src/modules/launcher/PowerLauncher/ViewModel/MainViewModel.cs
@@ -871,13 +871,25 @@ namespace PowerLauncher.ViewModel
             }
         }
 
+        public static bool ShouldAutoCompleteTextBeEmpty(string queryText, string autoCompleteText)
+        {
+            if (string.IsNullOrEmpty(autoCompleteText))
+            {
+                return false;
+            }
+            else
+            {
+                return string.IsNullOrEmpty(queryText) || autoCompleteText.IndexOf(queryText, StringComparison.Ordinal) != 0;
+            }
+        }
+
         public static string GetAutoCompleteText(int index, string input, string query)
         {
             if (!string.IsNullOrEmpty(input) && !string.IsNullOrEmpty(query))
             {
                 if (index == 0)
                 {
-                    if (input.IndexOf(query, StringComparison.InvariantCultureIgnoreCase) == 0)
+                    if (input.IndexOf(query, StringComparison.OrdinalIgnoreCase) == 0)
                     {
                         // Use the same case as the input query for the matched portion of the string
                         return query + input.Substring(query.Length);
@@ -894,7 +906,7 @@ namespace PowerLauncher.ViewModel
             {
                 if (index == 0 && !string.IsNullOrEmpty(query))
                 {
-                    if (input.IndexOf(query, StringComparison.InvariantCultureIgnoreCase) == 0)
+                    if (input.IndexOf(query, StringComparison.OrdinalIgnoreCase) == 0)
                     {
                         return query + input.Substring(query.Length);
                     }
diff --git a/src/modules/launcher/Wox.Test/MainViewModelTest.cs b/src/modules/launcher/Wox.Test/MainViewModelTest.cs
index 9675c74dd1..8701df2e2a 100644
--- a/src/modules/launcher/Wox.Test/MainViewModelTest.cs
+++ b/src/modules/launcher/Wox.Test/MainViewModelTest.cs
@@ -207,5 +207,61 @@ namespace Wox.Test
             // Assert
             Assert.AreEqual(input, autoCompleteText);
         }
+
+        [Test]
+        public void ShouldAutoCompleteTextBeEmpty_ShouldReturnFalse_WhenAutoCompleteTextIsEmpty()
+        {
+            // Arrange
+            string queryText = "Te";
+            string autoCompleteText = string.Empty;
+
+            // Act
+            bool result = MainViewModel.ShouldAutoCompleteTextBeEmpty(queryText, autoCompleteText);
+
+            // Assert
+            Assert.AreEqual(false, result);
+        }
+
+        [Test]
+        public void ShouldAutoCompleteTextBeEmpty_ShouldReturnTrue_WhenQueryTextMatchAutoCompleteText()
+        {
+            // Arrange
+            string queryText = "Te";
+            string autoCompleteText = "Teams";
+
+            // Act
+            bool result = MainViewModel.ShouldAutoCompleteTextBeEmpty(queryText, autoCompleteText);
+
+            // Assert
+            Assert.AreEqual(false, result);
+        }
+
+        [Test]
+        public void ShouldAutoCompleteTextBeEmpty_ShouldReturnTrue_WhenQueryTextIsEmpty()
+        {
+            // Arrange
+            string queryText = string.Empty;
+            string autoCompleteText = "Teams";
+
+            // Act
+            bool result = MainViewModel.ShouldAutoCompleteTextBeEmpty(queryText, autoCompleteText);
+
+            // Assert
+            Assert.AreEqual(true, result);
+        }
+
+        [Test]
+        public void ShouldAutoCompleteTextBeEmpty_ShouldReturnTrue_WhenQueryTextDoesNotMatchAutoCompleteText()
+        {
+            // Arrange
+            string queryText = "TE";
+            string autoCompleteText = "Teams";
+
+            // Act
+            bool result = MainViewModel.ShouldAutoCompleteTextBeEmpty(queryText, autoCompleteText);
+
+            // Assert
+            Assert.AreEqual(true, result);
+        }
     }
 }