diff --git a/src/trx-client/trx-frontend/trx-frontend-http/assets/web/app.js b/src/trx-client/trx-frontend/trx-frontend-http/assets/web/app.js
index 3c16ca5..7b37a98 100644
--- a/src/trx-client/trx-frontend/trx-frontend-http/assets/web/app.js
+++ b/src/trx-client/trx-frontend/trx-frontend-http/assets/web/app.js
@@ -632,7 +632,7 @@ function setTheme(theme) {
   }
   // Invalidate cached bookmark chip colours so they pick up the new theme palette.
   if (typeof bmRevision !== "undefined") bmRevision++;
-  if (typeof scheduleSpectrumDraw === "function") scheduleSpectrumDraw();
+  try { if (typeof scheduleSpectrumDraw === "function") scheduleSpectrumDraw(); } catch (_) {}
 }
 
 // ── Style / palette system ────────────────────────────────────────────────────