diff --git a/examples/validation/discussion/431.py b/examples/validation/discussion/431.py
new file mode 100644
index 00000000..2ff1b164
--- /dev/null
+++ b/examples/validation/discussion/431.py
@@ -0,0 +1,55 @@
+# -----------------------------------------------------------------------------
+# trame
+# -----------------------------------------------------------------------------
+from trame.app import get_server
+from trame.widgets import html
+
+CLIENT_TYPE = "vue3"
+
+if CLIENT_TYPE == "vue2":
+    from trame.widgets import vuetify2 as vuetify
+    from trame.ui.vuetify2 import SinglePageLayout
+else:
+    from trame.widgets import vuetify3 as vuetify
+    from trame.ui.vuetify3 import SinglePageLayout
+
+server = get_server()
+server.client_type = CLIENT_TYPE
+
+state, ui = server.state, server.ui  # ui is an instance of VirtualNodeManager
+
+
+def my_component(name):
+    """Emulate a component that is discovered at runtime"""
+    vname = f"my_comp_val_{name}"
+    with state:  # Force to update state before template
+        state.setdefault(vname, 0)
+    html.Div(name)
+    vuetify.VBtn("{{" + vname + "}}", click=f"{vname}++")
+
+
+def udpate_content():
+    with ui.customizable_slot.clear():
+        my_component(state.demanded_name)
+
+
+# -----------------------------------------------------------------------------
+# GUI (Layout)
+# -----------------------------------------------------------------------------
+
+# virtualnodes added to layout
+with SinglePageLayout(server) as layout:
+    with layout.content as content:
+        content.clear()
+        vuetify.VTextField(v_model=("demanded_name", "init"))
+        vuetify.VBtn("update content", click=udpate_content)
+        with html.Div():
+            ui.customizable_slot(layout)
+
+
+# -----------------------------------------------------------------------------
+# Main
+# -----------------------------------------------------------------------------
+
+if __name__ == "__main__":
+    server.start(open_browser=False)