🐛 [Bug]: Area 省市区选择报错用不了

[incloudZhang]

Which React Vant packages are impacted?

• [x] react-vant (React Vant core)
• [ ] react-vant-icons(React Vant Icon)

What version of React Vant are you using?

v3.3.1

Reproduce live demo(codesandebox or stackblitz)?

https://react-vant.3lang.dev/components/area

Descripition

area省市区选择器组件报错，官方例子也报错

[Moonisky]

+1，报错日志我这边是：

Warning: Cannot update a component (`HotReload`) while rendering a different component (`PickerInner`). To locate the bad setState() call inside `PickerInner`, follow the stack trace as described in https://reactjs.org/link/setstate-in-render
    at PickerInner (webpack-internal:///(app-pages-browser)/./node_modules/react-vant/es/picker/Picker.js:43:73)
    at div
    at Transition (webpack-internal:///(app-pages-browser)/./node_modules/react-transition-group/esm/Transition.js:130:30)
    at CSSTransition (webpack-internal:///(app-pages-browser)/./node_modules/react-transition-group/esm/CSSTransition.js:115:35)
    at eval (webpack-internal:///(app-pages-browser)/./node_modules/react-vant/es/popup/Popup.js:78:65)
    at PopupPicker (webpack-internal:///(app-pages-browser)/./node_modules/react-vant/es/picker/Picker.js:236:86)
    at eval (webpack-internal:///(app-pages-browser)/./node_modules/react-vant/es/area/Area.js:94:67)

Uncaught TypeError: Cannot read properties of undefined (reading 'indexOf')
    at unitToPx (webpack-internal:///(app-pages-browser)/./node_modules/react-vant/es/utils/format/unit.js:63:19)
    at eval (webpack-internal:///(app-pages-browser)/./node_modules/react-vant/es/picker/Picker.js:76:123)

[nieyunliang]

报错的问题可以设置itemHeight解决，但是，虽然不报错了，好像还是用不了！！！