diff --git a/src/rime/context.cc b/src/rime/context.cc
index 905ced34e..0ecd71b2a 100644
--- a/src/rime/context.cc
+++ b/src/rime/context.cc
@@ -292,4 +292,4 @@ void Context::ClearTransientOptions() {
   }
 }
 
-}  // namespace rime
+}  // namespace rime
\ No newline at end of file
diff --git a/src/rime/context.h b/src/rime/context.h
index 58ea39aa5..f66d2e926 100644
--- a/src/rime/context.h
+++ b/src/rime/context.h
@@ -110,4 +110,4 @@ class Context {
 
 }  // namespace rime
 
-#endif  // RIME_CONTEXT_H_
+#endif  // RIME_CONTEXT_H_
\ No newline at end of file
diff --git a/src/rime/dict/table.h b/src/rime/dict/table.h
index ea87d92eb..7db616eff 100644
--- a/src/rime/dict/table.h
+++ b/src/rime/dict/table.h
@@ -186,4 +186,4 @@ class Table : public MappedFile {
 
 }  // namespace rime
 
-#endif  // RIME_TABLE_H_
+#endif  // RIME_TABLE_H_
\ No newline at end of file
diff --git a/src/rime/gear/ascii_composer.cc b/src/rime/gear/ascii_composer.cc
index bba38a035..bc7880175 100644
--- a/src/rime/gear/ascii_composer.cc
+++ b/src/rime/gear/ascii_composer.cc
@@ -81,9 +81,10 @@ ProcessResult AsciiComposer::ProcessKeyEvent(const KeyEvent& key_event) {
   if (is_shift || is_ctrl) {
     if (key_event.release()) {
       if (shift_key_pressed_ || ctrl_key_pressed_) {
-        auto now = std::chrono::steady_clock::now();
-        if (now < toggle_expired_) {
-          ToggleAsciiModeWithKey(ch);
+        if (!key_event.ignored()) {
+          auto now = std::chrono::steady_clock::now();
+          if (now < toggle_expired_)
+            ToggleAsciiModeWithKey(ch);
         }
         shift_key_pressed_ = ctrl_key_pressed_ = false;
         return kNoop;
diff --git a/src/rime/key_event.h b/src/rime/key_event.h
index 22e48ae01..84bd58930 100644
--- a/src/rime/key_event.h
+++ b/src/rime/key_event.h
@@ -31,6 +31,7 @@ class KeyEvent {
   bool alt() const { return (modifier_ & kAltMask) != 0; }
   bool caps() const { return (modifier_ & kLockMask) != 0; }
   bool super() const { return (modifier_ & kSuperMask) != 0; }
+  bool ignored() const { return (modifier_ & kIgnoredMask) != 0; }
   bool release() const { return (modifier_ & kReleaseMask) != 0; }
   // 按鍵表示為形如「狀態+鍵名」的文字
   // 若無鍵名，則以四位或六位十六进制数形式的文字來標識
diff --git a/test/table_test.cc b/test/table_test.cc
index d78e02d65..61cc4222f 100644
--- a/test/table_test.cc
+++ b/test/table_test.cc
@@ -8,7 +8,6 @@
 #include <rime/algo/syllabifier.h>
 #include <rime/dict/table.h>
 
-
 class RimeTableTest : public ::testing::Test {
  public:
   virtual void SetUp() {
@@ -23,9 +22,8 @@ class RimeTableTest : public ::testing::Test {
     }
     table_->Load();
   }
-  virtual void TearDown() {
-    table_->Close();
-  }
+  virtual void TearDown() { table_->Close(); }
+
  protected:
   static const int total_num_entries = 8;
   static const char file_name[];
@@ -92,7 +90,7 @@ void RimeTableTest::PrepareSampleVocabulary(rime::Syllabary& syll,
   d->code.resize(3);
   d->code.push_back(2);
   d->code.push_back(1);
-  d->text  = "yi-er-san-er-yi";
+  d->text = "yi-er-san-er-yi";
   (*lv4)[-1].entries.push_back(d);
 }