diff --git a/plugin-designs/plugin-studio/plugin-studio.vue b/plugin-designs/plugin-studio/plugin-studio.vue
index 6258f9459..b7c5a793a 100644
--- a/plugin-designs/plugin-studio/plugin-studio.vue
+++ b/plugin-designs/plugin-studio/plugin-studio.vue
@@ -225,7 +225,7 @@ import StudioTree from './src/StudioTree.vue'
 import { LANGUAGES, loadLocale, saveLocale, getLanguage, normaliseLocale } from '@map/layouts/app-wrapper-material/languages.js'
 import { publishMapToken, clearMapToken } from '@map/composables/useSharedMapToken.js'
 import { loadScriptOnce, whenTagDefined } from '@map/utils/embedScript.js'
-import { readViewKeys, writeViewKeys, onAddressChange, urlOwnerOf, commitUrl } from '@map/composables/useViewAddress.js'
+import { readViewKeys, writeViewKeys, onAddressChange, urlOwnerOf, commitUrl, ownAddress } from '@map/composables/useViewAddress.js'
 
 // The reader's own map token / token-service URL. localStorage only: never written into the build,
 // never sent anywhere but Mapbox (the token) or the URL the reader typed (the service).
@@ -769,6 +769,9 @@ export default defineComponent({
       if (key) this.select(key, { fromHistory: true })
       else if (this.rows.length) this.select(this.rows[0].key, { fromHistory: true })
     })
+    // A nested composite's own choice (its open pane, its place) is announced up to here and written beside ?tab=,
+    // while this page owns its address. Only pane and place: the tab is Studio's own.
+    this._offOwn = ownAddress(this.$el, () => urlOwnerOf(this.cfg))
   },
   // The corner-widget hosts live on window.__doxaStudioWidgets so a HOT UPDATE remounts Studio onto
   // the same hosts and a live widget (Rudder) keeps its state. A real unmount must release them, or
@@ -777,6 +780,7 @@ export default defineComponent({
     // FIRST, before the hot-update return below: a remounted Studio adds its own listener, and a kept one would
     // re-apply every Back twice.
     if (this._offAddress) { this._offAddress(); this._offAddress = null }
+    if (this._offOwn) { this._offOwn(); this._offOwn = null }
     if (import.meta.hot) return
     const W = window.__doxaStudioWidgets
     if (W && W.hosts) for (const h of Object.values(W.hosts)) { try { h.remove() } catch (_) {} }