diff --git a/lib/shared/thread-utils.js b/lib/shared/thread-utils.js
--- a/lib/shared/thread-utils.js
+++ b/lib/shared/thread-utils.js
@@ -1468,6 +1468,9 @@
           threadIsInHome(sidebar.threadInfo) ===
             threadIsInHome(item.threadInfo),
       );
+      if (sidebarsOnlyInSameTab.length === item.sidebars.length) {
+        return item;
+      }
       return {
         ...item,
         sidebars: sidebarsOnlyInSameTab,