grid-view padding="[20,20,20,20]" 不生效

<navigation-bar title="Weixin" back="{{false}}" color="black" background="#FFF"></navigation-bar>

grid-view padding="[20,20,20,20]"

<scroll-view class="scroll-area" type="custom" scroll-y>

  <grid-view type="aligned" cross-axis-count="7" main-axis-gap="2" cross-axis-gap="2" padding="[20,20,20,20]">

    <view wx:for="{{list}}" style="border: 1px solid red;height: 20px;"></view>

  </grid-view>

</scroll-view>

代码片段 https://developers.weixin.qq.com/s/7schRNmM8d3f