@@ -94,6 +94,17 @@ describe("shell subtitle", () => {
     expect(screen.queryByText("Tenant", { exact: true })).toBeNull()
   })
 
+  // The rest of /admin mounts the same tenant-scoped resource pages as
+  // /console, and they resolve their namespace from the tenant context, so the
+  // picker has to stay: hiding it there leaves the active tenant invisible and
+  // unchangeable on the page it actually governs.
+  it("keeps the tenant picker on tenant-scoped admin pages", async () => {
+    const client = makeClient(TENANTS)
+    renderWithK8sProvider(<App />, { client, initialRoute: "/admin/virtualmachines" })
+
+    expect(await screen.findByText("Tenant", { exact: true })).toBeTruthy()
+  })
+
   it("still shows the tenant picker outside the admin portal", async () => {
     const client = makeClient(TENANTS)
     renderWithK8sProvider(<App />, { client, initialRoute: "/console" })
 
@@ -17,6 +17,14 @@ import { CommandPalette } from "./components/command-palette/command-palette.tsx
 import type { AppConfig } from "./lib/config.ts"
 import { DEFAULT_LANDING_PATH } from "./lib/portal.ts"
 
+const CLUSTER_SCOPED_ADMIN = [
+  "/admin/capacity",
+  "/admin/backups/backupclasses",
+  "/admin/external-ips",
+  "/admin/tenants",
+  "/admin/modules",
+]
+
 interface ShellProps {
   config: AppConfig
   username?: string
@@ -26,6 +34,14 @@ function Shell({ config, username }: ShellProps) {
   const { pathname } = useLocation()
   const inMarketplace = pathname.startsWith("/marketplace")
   const inAdmin = pathname.startsWith("/admin")
+  // Only the genuinely cluster-scoped admin pages have no tenant to show. The
+  // rest of /admin mounts the same tenant-scoped resource pages as /console
+  // (see lib/portal.ts), and those resolve their namespace from the tenant
+  // context, so hiding the picker there would leave the active tenant both
+  // invisible and unchangeable.
+  const inClusterScope = CLUSTER_SCOPED_ADMIN.some((prefix) =>
+    pathname.startsWith(prefix),
+  )
   const marketplaceSections = useMarketplaceSidebarSections()
   const consoleSections = useConsoleSidebarSections()
   const adminSections = useAdminSidebarSections()
@@ -47,7 +63,7 @@ function Shell({ config, username }: ShellProps) {
     <AppShell
       tabs={tabs}
       sections={sections}
-      subtitle={inAdmin ? undefined : <Breadcrumb />}
+      subtitle={inClusterScope ? undefined : <Breadcrumb />}
       onSearchClick={toggle}
       version={config.version || import.meta.env.VITE_APP_VERSION}
       logoSvg={config.logoSvg}
 
@@ -1,12 +1,14 @@
 import { useState, useMemo } from "react"
 import type { FieldProps, RJSFSchema, TemplatesType } from "@rjsf/utils"
+import { RJSF_ID_SEPARATOR } from "../lib/rjsf-ids.ts"
 import Form from "@rjsf/core"
 import validator from "@rjsf/validator-ajv8"
 import { customTemplates, customWidgets } from "./rjsf-templates.tsx"
 import { addDynamicOptionWidgets } from "../lib/dynamic-options.ts"
 
 export function AdditionalPropertiesField(props: FieldProps) {
-  const { schema, formData, onChange, readonly, disabled, name, required } = props
+  const { schema, formData, onChange, readonly, disabled, name, required, idSchema } =
+    props
   const [newKey, setNewKey] = useState("")
 
   // Get the schema for items from additionalProperties
@@ -87,6 +89,12 @@ export function AdditionalPropertiesField(props: FieldProps) {
             <div className="rounded-md bg-white p-3">
               <Form
                 tagName="div"
+                // Continue the outer form's id namespace into this entry.
+                // Without it the nested form restarts at "root", so a map
+                // entry's field renders as root_<field> while its validation
+                // error names <outer>.<key>.<field>, and nothing resolves it.
+                idPrefix={`${idSchema.$id}${RJSF_ID_SEPARATOR}${key}`}
+                idSeparator={RJSF_ID_SEPARATOR}
                 schema={itemSchema}
                 uiSchema={itemUiSchema}
                 formData={formData[key]}
 
@@ -208,6 +208,40 @@ describe("SchemaForm validate handle", () => {
     expect(document.activeElement).toBe(document.getElementById("root_name"))
   })
 
+  // #3135's own example lives inside an additionalProperties map, and those
+  // render in a nested form. Until that form continued the outer id namespace
+  // it restarted at "root", so the error named nodeGroups.md0.instanceType
+  // while the DOM held root_instanceType and the submit stayed silent.
+  it("focuses a required field inside an additionalProperties map", () => {
+    const mapSchema = JSON.stringify({
+      type: "object",
+      properties: {
+        nodeGroups: {
+          type: "object",
+          additionalProperties: {
+            type: "object",
+            required: ["instanceType"],
+            properties: { instanceType: { type: "string" } },
+          },
+        },
+      },
+    })
+    const ref = createRef<SchemaFormHandle>()
+    render(
+      <SchemaForm
+        ref={ref}
+        openAPISchema={mapSchema}
+        formData={{ nodeGroups: { md0: {} } }}
+        onChange={noop}
+      />,
+    )
+
+    expect(validate(ref)).toBe(false)
+    expect(document.activeElement).toBe(
+      document.getElementById("root_nodeGroups_md0_instanceType"),
+    )
+  })
+
   it("reports valid through the ref once the required field is populated", () => {
     const ref = createRef<SchemaFormHandle>()
     render(
 
@@ -5,6 +5,7 @@ import { getDefaultFormState } from "@rjsf/utils"
 import type { RJSFSchema, UiSchema, TemplatesType } from "@rjsf/utils"
 import { keysOrderToUiSchema, sanitizeSchema } from "../lib/keys-order.ts"
 import { focusFirstError } from "@/lib/focus-first-error.ts"
+import { RJSF_ID_PREFIX, RJSF_ID_SEPARATOR } from "../lib/rjsf-ids.ts"
 import { addSensitiveStringWidgets } from "../lib/sensitive-fields.ts"
 import {
   IMMUTABLE_HELP_TEXT,
@@ -18,9 +19,6 @@ import { ResourceQuotasField } from "./ResourceQuotasField.tsx"
 import { SourceField } from "./SourceField.tsx"
 import "./schema-form.css"
 
-const RJSF_ID_PREFIX = "root"
-const RJSF_ID_SEPARATOR = "_"
-
 /**
  * Recursively find all fields with additionalProperties schema and add widget.
  * Walks nested objects AND array items, so a map nested inside array elements
 
@@ -0,0 +1,9 @@
+/**
+ * RJSF's id configuration, shared rather than repeated: `SchemaForm` passes it
+ * to the form, `AdditionalPropertiesField` continues it into the nested form it
+ * mounts per map entry, and `focusFirstError` rebuilds an id from an error's
+ * property path. If those three disagree, a blocked submit resolves no element
+ * and scrolls nowhere.
+ */
+export const RJSF_ID_PREFIX = "root"
+export const RJSF_ID_SEPARATOR = "_"