diff --git a/Source/Modules/ControllerModules/KeyHandler.mm b/Source/Modules/ControllerModules/KeyHandler.mm
index 1986cb0a..eb042f1c 100644
--- a/Source/Modules/ControllerModules/KeyHandler.mm
+++ b/Source/Modules/ControllerModules/KeyHandler.mm
@@ -509,8 +509,10 @@ static NSString *const kGraphVizOutputfile = @"/tmp/vChewing-visualization.dot";
 
     // MARK: Punctuation list
     if ([input isSymbolMenuKey]) {
-        InputStateEmpty *empty = [[InputStateEmpty alloc] init];
-        stateCallback(empty);
+
+        // 得在這裡先 commit buffer，不然會導致「在摁 ESC 離開符號選單時會重複輸入上一次的組字區的內容」的不當行為。
+        // 於是這裡用「模擬一次 Enter 鍵的操作」使其代為執行這個 commit buffer 的動作。
+        [self _handleEnterWithState:state stateCallback:stateCallback errorCallback:errorCallback];
 
         SymbolNode *root = [SymbolNode root];
         InputStateSymbolTable *symbolState = [[InputStateSymbolTable alloc] initWithNode:root useVerticalMode:input.useVerticalMode];