Ionic Vue Modal shows content twice

Hi
In an Ionic Vue app I’m trying to display some simple content in a modal. However the content is always displayed twice. The same happens if I use the example from the ionic page (https://ionicframework.com/docs/api/modal):

Modal content component:

<template>
  <div>
    <ion-header>
      <ion-toolbar>
        <ion-title>{{ title }}</ion-title>
      </ion-toolbar>
    </ion-header>
    <ion-content class="ion-padding">
      {{ content }}
    </ion-content>
  </div>
</template>

<script>
import { IonContent, IonHeader, IonTitle, IonToolbar } from '@ionic/vue';
import { defineComponent } from 'vue';

export default defineComponent({
  name: 'Modal',
  props: {
    title: { type: String, default: 'Super Modal' },
  },
  data() {
    return {
      content: 'Content',
    }
  },
  components: { IonContent, IonHeader, IonTitle, IonToolbar }
});
</script>

Component that uses the modal:

<template>
  <ion-page>
    <ion-content class="ion-padding">
      <ion-button @click="openModal">Open Modal</ion-button>
    </ion-content>
  </ion-page>
</template>

<script>
  import { IonButton, IonContent, IonPage, modalController } from "@ionic/vue";
  import Modal from "../components/ItemModal.vue";

  export default {
    components: { IonButton, IonContent, IonPage },
    methods: {
      async openModal() {
        const modal = await modalController.create({
          component: Modal,
          cssClass: "my-custom-class",
          componentProps: {
            data: {
              content: "New Content",
            },
            propsData: {
              title: "New title",
            },
          },
        });
        return modal.present();
      },
    },
  };
</script>

Funnily enough the content component of the modal is displayed twice.

Screenshot 2020-12-07 at 21.15.031298×1278 24.6 KB

Screenshot 2020-12-07 at 21.15.411048×506 85.9 KB

Additionally, the props and data are not passed to the modal content component.

Am I missing something fundamental when using modals in Vue Ionic?

Thanks!

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