diff --git a/web/js/multi_bool_panel.js b/web/js/multi_bool_panel.js
index 00e5c74..5704165 100644
--- a/web/js/multi_bool_panel.js
+++ b/web/js/multi_bool_panel.js
@@ -74,41 +74,63 @@ function applyValue(targetNode, mode, value) {
   app.graph.setDirtyCanvas(true, true);
 }
 
-// ── rename polling (title hash) ─────────────────────────
-// The new frontend renames nodes by assigning node.title directly (no
-// graph.change() / onPropertyChanged fired), so renames are detected by
-// polling a title hash (cg-use-everywhere approach). One shared 500ms
-// interval: started when the first panel installs its hooks, stopped when
-// the last panel is removed.
+// ── canvas.setDirty hook (rename detection) ──────────────
+// The new frontend renames nodes by assigning node.title directly and only
+// calls canvas.setDirty — neither graph.change() nor onPropertyChanged fire.
+// Wrapping canvas.setDirty (installed once) is the only observable signal
+// for label changes; panels then re-render only when their own relevant key
+// actually changed. Add/remove are already covered by graph hooks.
 const panels = new Set();
-let titlesPollTimer = null;
-let lastTitlesKey = "";
+let panelsCheckTimer = null;
+const PANELS_CHECK_MS = 150;
 
-function titlesKey() {
-  return (app.graph?._nodes || [])
-    .map((n) => (n.title || "") + "\u0000" + (n.type || ""))
-    .join("|");
+function relevantKey(panel) {
+  const mode = getPanelMode(panel);
+  const names = resolveTargets(panel)
+    .map((t) => itemName(panel, t).toLowerCase())
+    .sort();
+  return (panel.title || "") + "\u0000" + mode + "\u0000" + names.join("\u0000");
 }
 
-function ensurePolling() {
-  if (titlesPollTimer == null && panels.size > 0) {
-    lastTitlesKey = titlesKey();
-    titlesPollTimer = setInterval(() => {
-      const k = titlesKey();
-      if (k !== lastTitlesKey) {
-        lastTitlesKey = k;
-        panels.forEach((p) => {
-          if (typeof p.__scheduleRefresh === "function") p.__scheduleRefresh();
-        });
-      }
-    }, 500);
-  }
+function checkPanels() {
+  panels.forEach((p) => {
+    if (typeof p.__scheduleRefresh !== "function") return;
+    const k = relevantKey(p);
+    if (k !== p.__mbpLastKey) {
+      p.__mbpLastKey = k;
+      p.__scheduleRefresh();
+    }
+  });
 }
 
-function stopPollingIfEmpty() {
-  if (panels.size === 0 && titlesPollTimer != null) {
-    clearInterval(titlesPollTimer);
-    titlesPollTimer = null;
+function schedulePanelsCheck() {
+  if (panelsCheckTimer) clearTimeout(panelsCheckTimer);
+  panelsCheckTimer = setTimeout(() => {
+    panelsCheckTimer = null;
+    checkPanels();
+  }, PANELS_CHECK_MS);
+}
+
+function mbpSetDirtyWrapper(fg, bg) {
+  const r = this.__mbpPrevSetDirty.call(this, fg, bg);
+  schedulePanelsCheck();
+  return r;
+}
+
+function installCanvasHook(canvas) {
+  if (!canvas || canvas.__mbpHooked) return;
+  canvas.__mbpPrevSetDirty = canvas.setDirty;
+  canvas.setDirty = mbpSetDirtyWrapper;
+  canvas.__mbpHooked = true;
+}
+
+function uninstallCanvasHook() {
+  if (panels.size > 0) return;
+  const canvas = app.canvas;
+  if (canvas && canvas.__mbpHooked && canvas.setDirty === mbpSetDirtyWrapper) {
+    canvas.setDirty = canvas.__mbpPrevSetDirty;
+    canvas.__mbpPrevSetDirty = null;
+    canvas.__mbpHooked = false;
   }
 }
 
@@ -262,8 +284,12 @@ function buildPanel(panelNode) {
     const rows = listEl.children.length;
     const h = rows * ROW_HEIGHT + HEADER_PAD;
     rowsHeight = Math.max(h + HEADER_PAD, 60);
-    panelNode.size = [panelNode.size[0], rowsHeight];
-    panelNode.setDirtyCanvas(true, true);
+    // Skip resize/redraw when the height is unchanged (avoids flicker from
+    // redundant setDirtyCanvas on every render pass).
+    if (panelNode.size[1] !== rowsHeight) {
+      panelNode.size = [panelNode.size[0], rowsHeight];
+      panelNode.setDirtyCanvas(true, true);
+    }
   }
 
   // ── toggle element factory ────────────────────────────
@@ -299,8 +325,8 @@ function buildPanel(panelNode) {
 
   // ── event hooks ───────────────────────────────────────
 
-  // Expose scheduleRefresh so the module-level rename poller can trigger
-  // refreshes on all live panels.
+  // Expose scheduleRefresh so checkPanels() (driven by the canvas.setDirty
+  // hook) can trigger refreshes on this panel.
   panelNode.__scheduleRefresh = scheduleRefresh;
 
   // nodeCreated runs inside the ComfyNode constructor, where node.graph is
@@ -341,7 +367,7 @@ function buildPanel(panelNode) {
   panelNode.onAdded = function (graph) {
     installGraphHooks(graph || panelNode.graph);
     panels.add(panelNode);
-    ensurePolling();
+    installCanvasHook(app.canvas);
     if (origOnAdded) origOnAdded.call(this, graph);
   };
 
@@ -357,6 +383,8 @@ function buildPanel(panelNode) {
 
   // Initial render
   render();
+  // Baseline for change detection so the first relevant change re-renders.
+  panelNode.__mbpLastKey = relevantKey(panelNode);
 
   // Cleanup on removal
   const origOnRemoved = panelNode.onRemoved;
@@ -364,7 +392,8 @@ function buildPanel(panelNode) {
     uninstallGraphHooks();
     panels.delete(panelNode);
     panelNode.__scheduleRefresh = null;
-    stopPollingIfEmpty();
+    panelNode.__mbpLastKey = null;
+    uninstallCanvasHook();
     if (origOnRemoved) origOnRemoved.call(this);
   };
 }