Vuetify/Mouseover不适用于v-system-nav

有没有办法让鼠标在v-system-nav上运行?我有以下几把小提琴可以证明我的问题:

https://jsfiddle.net/6dqfz3j2/1/

<div>
  <div id="content">
    <v-card @mouseover="abc">Mouseover this and look at the console. Mouseover works!</v-card>
    <v-system-bar @mouseover="abc">Mouseover this and look at the console. Mouseover does not work!</v-system-bar>
  </div>
</div>
...
methods: {
  abc() {
    console.log('hi');
  },
},

是虫子吗?是否有一些属性可以覆盖以使其工作?

谢谢