From a0e6853d4c19402c3c43088aa3037ef1d498bd64 Mon Sep 17 00:00:00 2001
From: Kiyotaka Hibino <hibino@muneatsu.me>
Date: Fri, 3 Jul 2026 06:52:08 +0900
Subject: [PATCH] Fix: prevent keyup propagation from Monaco editor triggering
 false dirty state (#1495)

---
 .../backend/formwidgets/codeeditor/assets/js/codeeditor.js    | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/modules/backend/formwidgets/codeeditor/assets/js/codeeditor.js b/modules/backend/formwidgets/codeeditor/assets/js/codeeditor.js
index de98732f8d..9e1ad1d4fe 100644
--- a/modules/backend/formwidgets/codeeditor/assets/js/codeeditor.js
+++ b/modules/backend/formwidgets/codeeditor/assets/js/codeeditor.js
@@ -455,6 +455,10 @@ registerHTMLLanguageService('twig', undefined, {
          *  - A visibility change listener
          */
         attachListeners() {
+            // Prevent jQuery from capturing keyup events via event bubbling
+            const editorNode = this.editor.getDomNode();
+            editorNode.addEventListener('keyup', (e) => e.stopPropagation(), true);
+
             this.model = this.editor.getModel();
 
             this.disposables.push(this.model.onDidChangeContent(() => {