diff --git a/Telegram/SourceFiles/boxes/peers/edit_peer_permissions_box.cpp b/Telegram/SourceFiles/boxes/peers/edit_peer_permissions_box.cpp
index 6910a43a6..d2d304993 100644
--- a/Telegram/SourceFiles/boxes/peers/edit_peer_permissions_box.cpp
+++ b/Telegram/SourceFiles/boxes/peers/edit_peer_permissions_box.cpp
@@ -314,7 +314,11 @@ ChatAdminRights AdminRightsForOwnershipTransfer(bool isGroup) {
 	return result;
 }
 
-Fn<void()> AboutGigagroupCallback(not_null<ChannelData*> channel) {
+Fn<void()> AboutGigagroupCallback(
+		not_null<ChannelData*> channel,
+		not_null<Window::SessionController*> controller) {
+	const auto weak = base::make_weak(controller.get());
+
 	const auto converting = std::make_shared<bool>();
 	const auto convertSure = [=] {
 		if (*converting) {
@@ -332,10 +336,11 @@ Fn<void()> AboutGigagroupCallback(not_null<ChannelData*> channel) {
 		}).send();
 	};
 	const auto convertWarn = [=] {
-		if (*converting) {
+		const auto strongController = weak.get();
+		if (*converting || !strongController) {
 			return;
 		}
-		Ui::show(Box([=](not_null<Ui::GenericBox*> box) {
+		strongController->show(Box([=](not_null<Ui::GenericBox*> box) {
 			box->setTitle(tr::lng_gigagroup_warning_title());
 			box->addRow(
 				object_ptr<Ui::FlatLabel>(
@@ -348,10 +353,11 @@ Fn<void()> AboutGigagroupCallback(not_null<ChannelData*> channel) {
 		}), Ui::LayerOption::KeepOther);
 	};
 	return [=] {
-		if (*converting) {
+		const auto strongController = weak.get();
+		if (*converting || !strongController) {
 			return;
 		}
-		Ui::show(Box([=](not_null<Ui::GenericBox*> box) {
+		strongController->show(Box([=](not_null<Ui::GenericBox*> box) {
 			box->setTitle(tr::lng_gigagroup_convert_title());
 			const auto addFeature = [&](rpl::producer<QString> text) {
 				using namespace rpl::mappers;
@@ -607,7 +613,9 @@ void EditPeerPermissionsBox::addSuggestGigagroup(
 		container,
 		tr::lng_rights_gigagroup_convert(),
 		rpl::single(QString()),
-		AboutGigagroupCallback(_peer->asChannel()),
+		AboutGigagroupCallback(
+			_peer->asChannel(),
+			_navigation->parentController()),
 		st::peerPermissionsButton));
 
 	container->add(
diff --git a/Telegram/SourceFiles/boxes/peers/edit_peer_permissions_box.h b/Telegram/SourceFiles/boxes/peers/edit_peer_permissions_box.h
index f4e23de39..38bbe1ec1 100644
--- a/Telegram/SourceFiles/boxes/peers/edit_peer_permissions_box.h
+++ b/Telegram/SourceFiles/boxes/peers/edit_peer_permissions_box.h
@@ -16,6 +16,7 @@ class VerticalLayout;
 } // namespace Ui
 
 namespace Window {
+class SessionController;
 class SessionNavigation;
 } // namespace Window
 
@@ -50,7 +51,8 @@ private:
 };
 
 [[nodiscard]] Fn<void()> AboutGigagroupCallback(
-	not_null<ChannelData*> channel);
+	not_null<ChannelData*> channel,
+	not_null<Window::SessionController*> controller);
 
 template <typename Flags>
 struct EditFlagsControl {
diff --git a/Telegram/SourceFiles/history/history_widget.cpp b/Telegram/SourceFiles/history/history_widget.cpp
index 4bcc7d696..bf8162baa 100644
--- a/Telegram/SourceFiles/history/history_widget.cpp
+++ b/Telegram/SourceFiles/history/history_widget.cpp
@@ -3935,7 +3935,7 @@ void HistoryWidget::checkSuggestToGigagroup() {
 						st::infoAboutGigagroup));
 				box->addButton(
 					tr::lng_gigagroup_suggest_more(),
-					AboutGigagroupCallback(group));
+					AboutGigagroupCallback(group, controller()));
 				box->addButton(tr::lng_cancel(), [=] { box->closeBox(); });
 			}));
 		}