NGrid has a suffix NGridItem, when collapsed grid, suffix item span not work(render style span 1)

[liuzw2579]

TuSimple/naive-ui version (版本)

2.20.2

Vue version (Vue 版本)

3.2.21

Browser and its version (浏览器及其版本)

Chrome 89

System and its version (系统及其版本)

Window 10

Node version (Node 版本)

Reappearance link (重现链接)

https://codesandbox.io/s/priceless-monad-wmxwh?file=/src/App.vue

Reappearance steps (重现步骤)

grid set cols 6, suffix set span 6, work right
click collpased btn, when collapsed grid, suffix span is 1

Expected results (期望的结果)

suffix span still is 6

Actual results (实际的结果)

suffix span render 1

Remarks (补充说明)