diff --git a/panels/dock/taskmanager/dockcombinemodel.cpp b/panels/dock/taskmanager/dockcombinemodel.cpp
index ecd414024..d32be7121 100644
--- a/panels/dock/taskmanager/dockcombinemodel.cpp
+++ b/panels/dock/taskmanager/dockcombinemodel.cpp
@@ -48,7 +48,7 @@ QVariant DockCombineModel::data(const QModelIndex &index, int role) const
         auto res = RoleCombineModel::data(index, m_roleMaps.value(TaskManager::DesktopIdRole)).toString();
         if (res.isEmpty()) {
             auto data = RoleCombineModel::data(index, m_roleMaps.value(TaskManager::IdentityRole)).toStringList();
-            res = data.value(0, "");
+            res = data.join("-");
         }
         return res;
     }
diff --git a/panels/dock/taskmanager/dockglobalelementmodel.cpp b/panels/dock/taskmanager/dockglobalelementmodel.cpp
index 03cfbc5a8..1cbc36bf5 100644
--- a/panels/dock/taskmanager/dockglobalelementmodel.cpp
+++ b/panels/dock/taskmanager/dockglobalelementmodel.cpp
@@ -64,25 +64,55 @@ DockGlobalElementModel::DockGlobalElementModel(QAbstractItemModel *appsModel, Do
                 auto index = m_activeAppModel->index(i, 0);
                 auto desktopId = index.data(TaskManager::DesktopIdRole).toString();
 
-                auto it = std::find_if(m_data.begin(), m_data.end(), [this, &desktopId](auto &data) {
-                    return m_appsModel == std::get<1>(data) && desktopId == std::get<0>(data);
+               if (desktopId.isEmpty())
+                    continue;
+                //将同一应用的窗口添加到一起 
+                // Find the first occurrence of this app in m_data (either docked item or existing window)
+                auto firstIt = std::find_if(m_data.begin(), m_data.end(), [&desktopId](const auto &data) {
+                    return std::get<0>(data) == desktopId;
                 });
 
-                if (it != m_data.end()) {
-                    *it = std::make_tuple(desktopId, m_activeAppModel, i);
-                    auto pIndex = this->index(it - m_data.begin(), 0);
-                    Q_EMIT dataChanged(pIndex, pIndex, {TaskManager::ActiveRole, TaskManager::AttentionRole, TaskManager::WindowsRole, TaskManager::MenusRole});
-
-                } else {
+                if (firstIt == m_data.end()) {
+                    // No docked item or existing window yet, append to the end
                     beginInsertRows(QModelIndex(), m_data.size(), m_data.size());
                     m_data.append(std::make_tuple(desktopId, m_activeAppModel, i));
                     endInsertRows();
+                    continue;
                 }
+
+                // If the first occurrence still comes from m_appsModel, this is the first window:
+                // reuse the docked position and turn it into a running window.
+                if (std::get<1>(*firstIt) == m_appsModel) {
+                    *firstIt = std::make_tuple(desktopId, m_activeAppModel, i);
+                    auto pIndex = this->index(firstIt - m_data.begin(), 0);
+                    Q_EMIT dataChanged(pIndex,
+                                       pIndex,
+                                       {TaskManager::ActiveRole,
+                                        TaskManager::AttentionRole,
+                                        TaskManager::WindowsRole,
+                                        TaskManager::MenusRole,
+                                        TaskManager::WinTitleRole});
+                    continue;
+                }
+
+                // There are already windows for this app: insert the new window
+                // right after the last existing one so that all windows stay together.
+                auto lastIt = firstIt;
+                while (lastIt + 1 != m_data.end() && std::get<0>(*(lastIt + 1)) == desktopId) {
+                    ++lastIt;
+                }
+
+                auto insertRow = (lastIt - m_data.begin()) + 1;
+                beginInsertRows(QModelIndex(), insertRow, insertRow);
+                m_data.insert(lastIt + 1, std::make_tuple(desktopId, m_activeAppModel, i));
+                endInsertRows();
             }
 
             std::for_each(m_data.begin(), m_data.end(), [this, first, last](auto &data) {
                 if (std::get<1>(data) == m_activeAppModel && std::get<2>(data) > first) {
-                    data = std::make_tuple(std::get<0>(data), std::get<1>(data), std::get<2>(data) + ((last - first) + 1));
+                    data = std::make_tuple(std::get<0>(data),
+                                           std::get<1>(data),
+                                           std::get<2>(data) + ((last - first) + 1));
                 }
             });
         },