diff --git a/src/dbusinterface.h b/src/dbusinterface.h
--- a/src/dbusinterface.h
+++ b/src/dbusinterface.h
@@ -32,6 +32,19 @@
     Q_SCRIPTABLE void ShowFolders(const QStringList& uriList, const QString& startUpId);
     Q_SCRIPTABLE void ShowItems(const QStringList& uriList, const QString& startUpId);
     Q_SCRIPTABLE void ShowItemProperties(const QStringList& uriList, const QString& startUpId);
+
+    /**
+     * Set whether this interface has been created by dolphin --deamon.
+     */
+    void setAsDaemon();
+
+    /**
+     * @return Whether this interface has been created by dolphin --deamon.
+     */
+    bool isDaemon() const;
+
+private:
+    bool m_isDaemon = false;
 };
 
 #endif // DBUSINTERFACE_H
diff --git a/src/dbusinterface.cpp b/src/dbusinterface.cpp
--- a/src/dbusinterface.cpp
+++ b/src/dbusinterface.cpp
@@ -44,7 +44,7 @@
     if (urls.isEmpty()) {
         return;
     }
-    const auto serviceName = QStringLiteral("org.kde.dolphin-%1").arg(QCoreApplication::applicationPid());
+    const auto serviceName = isDaemon() ? QString() : QStringLiteral("org.kde.dolphin-%1").arg(QCoreApplication::applicationPid());
     if(!Dolphin::attachToExistingInstance(urls, false, GeneralSettings::splitView(), serviceName)) {
         Dolphin::openNewWindow(urls);
     }
@@ -57,7 +57,7 @@
     if (urls.isEmpty()) {
         return;
     }
-    const auto serviceName = QStringLiteral("org.kde.dolphin-%1").arg(QCoreApplication::applicationPid());
+    const auto serviceName = isDaemon() ? QString() : QStringLiteral("org.kde.dolphin-%1").arg(QCoreApplication::applicationPid());
     if(!Dolphin::attachToExistingInstance(urls, true, GeneralSettings::splitView(), serviceName)) {
         Dolphin::openNewWindow(urls, nullptr, Dolphin::OpenNewWindowFlag::Select);
     };
@@ -71,3 +71,13 @@
         KPropertiesDialog::showDialog(urls);
     }
 }
+
+void DBusInterface::setAsDaemon()
+{
+    m_isDaemon = true;
+}
+
+bool DBusInterface::isDaemon() const
+{
+    return m_isDaemon;
+}
diff --git a/src/global.h b/src/global.h
--- a/src/global.h
+++ b/src/global.h
@@ -45,7 +45,9 @@
 
     /**
      * Attaches URLs to an existing Dolphin instance if possible.
-     * Returns true if URLs were successfully attached
+     * If @p preferredService is a valid dbus service, it will be tried first.
+     * @p preferredService needs to support the org.kde.dolphin.MainWindow dbus interface with the /dolphin/Dolphin_1 path.
+     * Returns true if the URLs were successfully attached.
      */
     bool attachToExistingInstance(const QList<QUrl>& inputUrls, bool openFiles, bool splitView, const QString& preferredService = QString());
 
diff --git a/src/global.cpp b/src/global.cpp
--- a/src/global.cpp
+++ b/src/global.cpp
@@ -82,7 +82,7 @@
         QSharedPointer<QDBusInterface> preferredInterface(
             new QDBusInterface(preferredService,
             QStringLiteral("/dolphin/Dolphin_1"),
-            QString()) // #414402: use empty interface name to prevent QtDBus from caching the interface.
+            QStringLiteral("org.kde.dolphin.MainWindow"))
         );
         if (preferredInterface->isValid() && !preferredInterface->lastError().isValid()) {
             dolphinInterfaces.append(qMakePair(preferredInterface, QStringList()));
diff --git a/src/main.cpp b/src/main.cpp
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -143,6 +143,7 @@
     if (parser.isSet(QStringLiteral("daemon"))) {
         KDBusService dolphinDBusService;
         DBusInterface interface;
+        interface.setAsDaemon();
         return app.exec();
     }