初次渲染显示效果正常，切换动态内容后失效。

<view class="mcq" style="font-variant: diagonal-fractions;">
  {{text}}
</view>

<button bind:tap="onChangeNumber">动态切换</button>

//index.js
Page({
  data: {
    text: "",
    quizs: [
      {question: '1/9' },
      {question: '3/9'},
      {question: '4/9'},
      {question: '5/9'},
  ]
  },
  onLoad() {
    var that = this;
  
    this.setData({
      text: that.data.quizs[0].question
    })
  },
  onChangeNumber() {
    var that = this;

    this.setData({
      text: that.data.quizs[2].question
    })
  }
})

代码片段链接：https://developers.weixin.qq.com/s/tq76gXmN7MJ6