diff --git a/src/browser/base/zen-components/ZenPinnedTabManager.mjs b/src/browser/base/zen-components/ZenPinnedTabManager.mjs
index c81e6a670..0e6d0fee9 100644
--- a/src/browser/base/zen-components/ZenPinnedTabManager.mjs
+++ b/src/browser/base/zen-components/ZenPinnedTabManager.mjs
@@ -238,6 +238,7 @@
           );
           contaienr.insertBefore(newTab, contaienr.lastChild);
         }
+        gBrowser.tabContainer._invalidateCachedTabs();
 
         newTab.initialize();
       }