Grid组件下使用动态组件混合固定组件添加GridItem时，白屏并报错：TypeError: Cannot read property 'columnNum' of undefined

[xjkuchao]

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• Web 平台（H5）

BUG 描述
Grid组件下使用动态组件混合固定组件添加GridItem时，白屏并报错：TypeError: Cannot read property 'columnNum' of undefined

复现步骤
以vantui/packages/vantui/src/grid/demo/demo3.tsx为例，只需要修改为

import { Grid, GridItem, Image } from '@antmjs/vantui'

export default function Demo() {
  return (
    <Grid columnNum="3" border={false}>
      {[1, 2, 3].map((index) => (
        <GridItem key={index}>
          <Image
            style="width: 100%; height: 90px;"
            src={`https://img.yzcdn.cn/vant/apple-${index + 1}.jpg`}
          />
        </GridItem>
      ))}
      <GridItem icon="plus" />
    </Grid>
  )
}

即可重现

期望结果
混合动态添加和固定GridItem时表现正常

实际结果
白屏并报错：TypeError: Cannot read property 'columnNum' of undefined

截图

环境
"@antmjs/vantui": "^3.4.3",
"@babel/runtime": "^7.24.7",
"@tarojs/components": "^3.6.32",
"@tarojs/helper": "^3.6.32",
"@tarojs/plugin-framework-react": "^3.6.32",
"@tarojs/plugin-html": "^3.6.32",
"@tarojs/plugin-http": "^3.6.32",
"@tarojs/plugin-platform-weapp": "^3.6.32",
"@tarojs/react": "^3.6.32",
"@tarojs/runtime": "^3.6.32",
"@tarojs/shared": "^3.6.32",
"@tarojs/taro": "^3.6.32",

附加信息
无