vue3: unmounted apps are still available in the app drown

[ChristianBirkl]

Version

6.0.0-beta.11

Browser and OS info

Chrome 90 / Windows10

Steps to reproduce

create new vue app with the following component:

<template>
  <div id="compA"></div>
  <input type="button" @click="createApp" value=" app" />
  <input type="button" @click="deleteApp" value="-app" />
</template>

<script lang="ts">
import { defineComponent, createApp } from "vue";

import CompA from "./components/CompA.vue";

export default defineComponent({
  data() {
    return {
      subApp: null as any,
    };
  },
  methods: {
    createApp() {
      this.subApp = createApp(CompA);
      this.subApp.mount("#compA");
    },
    deleteApp() {
      this.subApp.unmount();
    },
  },
});
</script>

Steps:

1. click +app
2. click -app

What is expected?

App 2 not available in the app drop down

What is actually happening?

App 2 still available in the app drop down

[Akryum]

Oops