diff --git a/plugins/application-tray/ddeindicatortrayprotocol.cpp b/plugins/application-tray/ddeindicatortrayprotocol.cpp
index 2ac086350..a64f0f448 100644
--- a/plugins/application-tray/ddeindicatortrayprotocol.cpp
+++ b/plugins/application-tray/ddeindicatortrayprotocol.cpp
@@ -1,4 +1,4 @@
-// SPDX-FileCopyrightText: 2024-2026 UnionTech Software Technology Co., Ltd.
+// SPDX-FileCopyrightText: 2024 - 2026 UnionTech Software Technology Co., Ltd.
 //
 // SPDX-License-Identifier: GPL-3.0-or-later
 
@@ -178,7 +178,7 @@ void DDEindicatorProtocolHandlerPrivate::updateContent()
     Q_Q(DDEindicatorProtocolHandler);
     if (!enabled) return;
 
-    auto widget = static_cast<QWidget*>(q->parent());
+    auto widget = q->window();
 
     if (widget) {
         widget->update();
@@ -333,9 +333,12 @@ bool DDEindicatorProtocolHandler::eventFilter(QObject *watched, QEvent *event)
 {
     Q_D(DDEindicatorProtocolHandler);
 
-    if (watched == parent()) {
+    if (watched == window()) {
         if (event->type() == QEvent::Paint) {
-            auto widget = static_cast<QWidget*>(parent());
+            auto widget = window();
+            if (!widget)
+                return false;
+
             QPainter painter(widget);
             QFontMetrics qfm = QFontMetrics(widget->font());
             QRect tightTextRect = qfm.tightBoundingRect(d->m_text);
diff --git a/plugins/application-tray/sniprotocolhandler.cpp b/plugins/application-tray/sniprotocolhandler.cpp
index 4f85e7cd4..94a0ecbbf 100644
--- a/plugins/application-tray/sniprotocolhandler.cpp
+++ b/plugins/application-tray/sniprotocolhandler.cpp
@@ -328,8 +328,11 @@ bool SniTrayProtocolHandler::eventFilter(QObject *watched, QEvent *event)
                 menu->setFixedSize(menu->sizeHint());
                 menu->winId();
 
-                auto widget = static_cast<QWidget*>(parent());
-                auto plugin = Plugin::EmbedPlugin::get(widget->window()->windowHandle());
+                auto *win = window()->windowHandle();
+                if (!win)
+                    return false;
+
+                auto plugin = Plugin::EmbedPlugin::get(win);
                 auto geometry = plugin->pluginPos();
                 auto pluginPopup = Plugin::PluginPopup::get(menu->windowHandle());
                 pluginPopup->setPluginId("application-tray");
diff --git a/plugins/application-tray/trayplugin.cpp b/plugins/application-tray/trayplugin.cpp
index f1afcc73a..33783f4b5 100644
--- a/plugins/application-tray/trayplugin.cpp
+++ b/plugins/application-tray/trayplugin.cpp
@@ -1,4 +1,4 @@
-// SPDX-FileCopyrightText: 2024-2026 UnionTech Software Technology Co., Ltd.
+// SPDX-FileCopyrightText: 2024 - 2026 UnionTech Software Technology Co., Ltd.
 //
 // SPDX-License-Identifier: GPL-3.0-or-later
 
@@ -83,14 +83,18 @@ void TrayPlugin::onTrayhandlerCreatd(QPointer<AbstractTrayProtocolHandler> handl
     m_widget.insert(id, new TrayWidget(handler));
 
     auto remove = [this, id]() {
+        // 清理 tooltip 指针，因为 tooltip widget 是 handler 的成员变量，
+        // 当 handler 被销毁时会被删除，所以需要先从 map 中移除悬空指针
+        m_tooltip.remove(id);
+
         m_proyInter->itemRemoved(this, id);
+
         auto widget = m_widget.value(id);
         if (widget) {
             widget->deleteLater();
         }
 
         m_widget.remove(id);
-        m_tooltip.remove(id);
     };
 
     auto showWidget = [this, handler, id](){
diff --git a/plugins/application-tray/traywidget.cpp b/plugins/application-tray/traywidget.cpp
index 0f94d7225..f61cf04a8 100644
--- a/plugins/application-tray/traywidget.cpp
+++ b/plugins/application-tray/traywidget.cpp
@@ -1,4 +1,4 @@
-// SPDX-FileCopyrightText: 2024 UnionTech Software Technology Co., Ltd.
+// SPDX-FileCopyrightText: 2024 - 2026 UnionTech Software Technology Co., Ltd.
 //
 // SPDX-License-Identifier: GPL-3.0-or-later
 
@@ -28,7 +28,8 @@ TrayWidget::TrayWidget(QPointer<AbstractTrayProtocolHandler> handler)
     setWindowTitle(m_handler->id());
     setFixedSize(trayIconSize, trayIconSize);
 
-    m_handler->setParent(this);
+    // Note: Do NOT set parent here - handler lifecycle is managed by QSharedPointer
+    // Setting parent would cause double-delete when QSharedPointer destroys the handler
 
     connect(m_handler, &AbstractTrayProtocolHandler::iconChanged, this, [this](){update();});
     connect(m_handler, &AbstractTrayProtocolHandler::overlayIconChanged, this, [this](){update();});
@@ -47,6 +48,9 @@ TrayWidget::~TrayWidget()
 void TrayWidget::showEvent(QShowEvent* event)
 {
     Q_UNUSED(event)
+    if (!m_handler)
+        return;
+
     m_handler->setWindow(window());
     window()->installEventFilter(m_handler);
     window()->setMouseTracking(true);
@@ -56,6 +60,9 @@ void TrayWidget::paintEvent(QPaintEvent* event)
 {
     Q_UNUSED(event)
 
+    if (!m_handler)
+        return;
+
     // TODO: support attentionIcon/overlayIcon
     QPalette palette;
     auto textColor = DGuiApplicationHelper::instance()->themeType() == DGuiApplicationHelper::LightType ? Qt::black : Qt::white;