diff --git a/src/slic3r/GUI/MainFrame.cpp b/src/slic3r/GUI/MainFrame.cpp
index 334bd9f3d4..9e3d40994b 100644
--- a/src/slic3r/GUI/MainFrame.cpp
+++ b/src/slic3r/GUI/MainFrame.cpp
@@ -1385,7 +1385,7 @@ void MainFrame::show_device(bool should_use_native) {
     // The web page is appended when printer agents are enabled. Remove that
     // extra page before switching back to the normal native/Web layout.
     if (!use_printer_agents) {
-        if ((idx = m_tabpanel->FindPage(m_printer_view)) != wxNOT_FOUND && idx != m_tabpanel->FindPageByName(TAB_ID_MONITOR)) {
+        if ((idx = m_tabpanel->FindPageByName(TAB_ID_MONITOR_WEB)) != wxNOT_FOUND) {
             m_printer_view->Show(false);
             m_tabpanel->RemovePage(idx);
         }
@@ -1447,7 +1447,8 @@ void MainFrame::show_device(bool should_use_native) {
 
         if ((idx = m_tabpanel->FindPage(m_printer_view)) == wxNOT_FOUND) {
             m_printer_view->Show(false);
-            m_tabpanel->AddPage(m_printer_view, _L("Device (legacy)"), false, Notebook::PAGE_MONITOR);
+            m_tabpanel->InsertPage(m_tabpanel->GetPageCount(), TAB_ID_MONITOR_WEB, m_printer_view,
+                                   _L("Device (Web)"), "tab_monitor_active", false);
         } else {
             m_tabpanel->SetPageText(idx, _L("Device (Web)"));
         }
diff --git a/src/slic3r/GUI/MainFrame.hpp b/src/slic3r/GUI/MainFrame.hpp
index 6d8e548ce8..d6e8173288 100644
--- a/src/slic3r/GUI/MainFrame.hpp
+++ b/src/slic3r/GUI/MainFrame.hpp
@@ -43,6 +43,10 @@
 #define TAB_ID_PREPARE       "prepare"
 #define TAB_ID_PREVIEW       "preview"
 #define TAB_ID_MONITOR       "monitor"
+// Printer-agents mode shows the legacy web page alongside the native Device tab, so it needs an
+// id of its own: sharing TAB_ID_MONITOR makes every name lookup resolve to whichever of the two
+// comes first, which silently defeats PluginPages' selection round-trip across a tab relayout.
+#define TAB_ID_MONITOR_WEB   "monitor_web"
 #define TAB_ID_MULTI_DEVICE  "multi_device"
 #define TAB_ID_PROJECT       "project"
 #define TAB_ID_CALIBRATION   "calibration"