diff --git a/browser/ui/sidebar/sidebar_browsertest.cc b/browser/ui/sidebar/sidebar_browsertest.cc
index df8c5741864c..57642f8a456d 100644
--- a/browser/ui/sidebar/sidebar_browsertest.cc
+++ b/browser/ui/sidebar/sidebar_browsertest.cc
@@ -1242,6 +1242,21 @@ IN_PROC_BROWSER_TEST_F(SidebarBrowserTestWithAIChat,
   EXPECT_TRUE(model()->active_index().has_value());
   EXPECT_EQ(model()->active_index(),
             model()->GetIndexOf(SidebarItem::BuiltInItemType::kBookmarks));
+
+  // Check tab specific panel item is still activated after moving to another
+  // browser.
+  tab_model()->ActivateTabAt(1);
+  EXPECT_EQ(model()->active_index(), tab_specific_item_index);
+
+  auto* browser2 = CreateBrowser(browser()->profile());
+  auto* browser2_model =
+      static_cast<BraveBrowser*>(browser2)->sidebar_controller()->model();
+  auto* browser2_tab_model = browser2->tab_strip_model();
+
+  auto detached_tab = tab_model()->DetachTabAtForInsertion(1);
+  browser2_tab_model->AppendTab(std::move(detached_tab), /* foreground */ true);
+  EXPECT_EQ(browser2_model->active_index(),
+            browser2_model->GetIndexOf(SidebarItem::BuiltInItemType::kChatUI));
 }
 
 IN_PROC_BROWSER_TEST_F(SidebarBrowserTestWithAIChat,
diff --git a/browser/ui/views/side_panel/brave_side_panel_coordinator.cc b/browser/ui/views/side_panel/brave_side_panel_coordinator.cc
index 16295c36c53f..a4fc9cade194 100644
--- a/browser/ui/views/side_panel/brave_side_panel_coordinator.cc
+++ b/browser/ui/views/side_panel/brave_side_panel_coordinator.cc
@@ -42,11 +42,6 @@ void BraveSidePanelCoordinator::Show(
   sidebar::SetLastUsedSidePanel(browser_view_->GetProfile()->GetPrefs(),
                                 entry_key.id());
 
-  // Notify to give opportunity to observe another panel entries from
-  // global or active tab's contextual registry.
-  auto* brave_browser_view = static_cast<BraveBrowserView*>(browser_view_);
-  brave_browser_view->WillShowSidePanel();
-
   SidePanelCoordinator::Show(entry_key, open_trigger);
 }
 
@@ -91,13 +86,6 @@ void BraveSidePanelCoordinator::Toggle() {
 void BraveSidePanelCoordinator::Toggle(
     SidePanelEntryKey key,
     SidePanelUtil::SidePanelOpenTrigger open_trigger) {
-  // Notify to give opportunity to observe another panel entries from
-  // global or active tab's contextual registry.
-  if (!IsSidePanelShowing()) {
-    auto* brave_browser_view = static_cast<BraveBrowserView*>(browser_view_);
-    brave_browser_view->WillShowSidePanel();
-  }
-
   SidePanelCoordinator::Toggle(key, open_trigger);
 }
 
@@ -160,6 +148,11 @@ void BraveSidePanelCoordinator::PopulateSidePanel(
     return;
   }
 
+  // Notify to give opportunity to observe another panel entries from
+  // global or active tab's contextual registry.
+  auto* brave_browser_view = static_cast<BraveBrowserView*>(browser_view_);
+  brave_browser_view->WillShowSidePanel();
+
   SidePanelCoordinator::PopulateSidePanel(supress_animations, unique_key, entry,
                                           std::move(content_view));
 }
@@ -167,11 +160,6 @@ void BraveSidePanelCoordinator::PopulateSidePanel(
 void BraveSidePanelCoordinator::NotifyPinnedContainerOfActiveStateChange(
     SidePanelEntryKey key,
     bool is_active) {
-  // // Notify to give opportunity to observe another panel entries from
-  // // global or active tab's contextual registry.
-  // auto* brave_browser_view = static_cast<BraveBrowserView*>(browser_view_);
-  // brave_browser_view->WillShowSidePanel();
-
   if (!browser_view_->toolbar()->pinned_toolbar_actions_container()) {
     return;
   }
diff --git a/browser/ui/views/side_panel/brave_side_panel_coordinator.h b/browser/ui/views/side_panel/brave_side_panel_coordinator.h
index 98fc1134fd4f..a0f108b39d87 100644
--- a/browser/ui/views/side_panel/brave_side_panel_coordinator.h
+++ b/browser/ui/views/side_panel/brave_side_panel_coordinator.h
@@ -9,7 +9,7 @@
 #include <memory>
 #include <optional>
 
-#include "chrome/browser/ui/views/side_panel/side_panel_coordinator.h"  // IWYU pragma: export
+#include "chrome/browser/ui/views/side_panel/side_panel_coordinator.h"
 
 class BraveSidePanelCoordinator : public SidePanelCoordinator {
  public: