diff --git a/src/ZB.MOM.WW.ScadaBridge.CentralUI/Components/Dialogs/NodeBrowserDialog.razor b/src/ZB.MOM.WW.ScadaBridge.CentralUI/Components/Dialogs/NodeBrowserDialog.razor
index d104982c..8c59e376 100644
--- a/src/ZB.MOM.WW.ScadaBridge.CentralUI/Components/Dialogs/NodeBrowserDialog.razor
+++ b/src/ZB.MOM.WW.ScadaBridge.CentralUI/Components/Dialogs/NodeBrowserDialog.razor
@@ -1,6 +1,7 @@
 @using Microsoft.AspNetCore.Components.Web
 @using ZB.MOM.WW.ScadaBridge.Commons.Interfaces.Protocol
 @using ZB.MOM.WW.ScadaBridge.Commons.Messages.Management
+@using ZB.MOM.WW.ScadaBridge.Commons.Types.DataConnections
 @using ZB.MOM.WW.ScadaBridge.CentralUI.Services
 @inject IBrowseService BrowseService
 
@@ -89,9 +90,17 @@
 
                     <div class="input-group">
                         <span class="input-group-text">Manual node id:</span>
-                        <input class="form-control" @bind="_manualNodeId" placeholder="ns=2;s=..." />
+                        <input class="form-control" @bind="_manualNodeId" @bind:event="oninput" placeholder="nsu=&lt;namespace-uri&gt;;s=..." />
                         <button class="btn btn-outline-secondary" @onclick="UseManual" disabled="@string.IsNullOrWhiteSpace(_manualNodeId)">Use</button>
                     </div>
+                    @if (!OpcUaReferenceForm.IsDurable(_manualNodeId))
+                    {
+                        <small class="text-warning-emphasis d-block mt-1" data-test="ns-index-warning">
+                            This is a bare namespace-<em>index</em> binding. Indexes can silently re-point after a
+                            server namespace change — prefer selecting from the tree above (it stores the durable
+                            <code>nsu=&lt;uri&gt;;…</code> form).
+                        </small>
+                    }
                 </div>
                 <div class="modal-footer">
                     <span class="me-auto text-muted">Selected: <code>@(_selectedNodeId ?? "(none)")</code></span>