diff --git a/src/slic3r/GUI/Plater.cpp b/src/slic3r/GUI/Plater.cpp
index 9fad2574ab..bf9d697a7a 100644
--- a/src/slic3r/GUI/Plater.cpp
+++ b/src/slic3r/GUI/Plater.cpp
@@ -11245,7 +11245,15 @@ void Plater::priv::on_tab_selection_changing(wxBookCtrlEvent& e)
             }
         }
     } else {
-        if (new_sel == main_frame->m_tabpanel->FindPageByName(TAB_ID_MONITOR) && wxGetApp().preset_bundle != nullptr) {
+        // Pointer test, not a name lookup: in printer-agents mode this page is TAB_ID_MONITOR_WEB
+        // while the native Device tab holds TAB_ID_MONITOR, and in legacy-web mode it holds
+        // TAB_ID_MONITOR itself.
+        const bool selecting_web_device_tab = main_frame->m_printer_view &&
+            main_frame->m_tabpanel->GetPage(new_sel) == main_frame->m_printer_view;
+        if (selecting_web_device_tab) {
+            // Use the selected discovered machine when the preset has no host.
+            main_frame->load_printer_url();
+        } else if (new_sel == main_frame->m_tabpanel->FindPageByName(TAB_ID_MONITOR) && wxGetApp().preset_bundle != nullptr) {
             auto     cfg = wxGetApp().preset_bundle->printers.get_edited_preset().config;
             wxString url = from_u8(PrintHost::get_print_host_webui(&cfg));
             if (main_frame->m_printer_view && url.empty()) {