tree -> expand-on-click -> flatten.js err: TypeError: Cannot read properties of undefined (reading 'forEach')

[gowy222]

TuSimple/naive-ui version (版本)

2.30.3

Vue version (Vue 版本)

3.2.37

Browser and its version (浏览器及其版本)

95内核 100内核 都复现

System and its version (系统及其版本)

win11

Node version (Node 版本)

Reappearance link (重现链接)

https://www.naiveui.com/zh-CN/dark/components/tree#node-props.vue

Reappearance steps (重现步骤)

官网 代码样本 异步加载 block-node expand-on-click

<n-tree
	class=""
	style="white-space: nowrap"
	block-line
	block-node
	selectable
	expand-on-click
	:data="data"
	:on-load="handleLoad"
	:on-update:selected-keys="handleSelectedKeysChange"
/>

点击tree item
Uncaught (in promise) TypeError: Cannot read properties of undefined (reading 'forEach')
at traverse (flatten.js?646f:5)
at flatten (flatten.js?646f:21)
at eval (Tree.js?9e9b:408)
at callWithErrorHandling (runtime-core.esm-bundler.js?f781:155)
at callWithAsyncErrorHandling (runtime-core.esm-bundler.js?f781:164)
at Array.job (runtime-core.esm-bundler.js?f781:1782)
at flushPreFlushCbs (runtime-core.esm-bundler.js?f781:328)
at flushJobs (runtime-core.esm-bundler.js?f781:371)

Expected results (期望的结果)

点击 label 可以直接 自动展开 或者 收起 节点

Actual results (实际的结果)

Uncaught (in promise) TypeError: Cannot read properties of undefined (reading 'forEach')

Remarks (补充说明)

[gowy222]

估计是 异步 加载数据，flatten -> forEach却已经跑了，没等异步返回数据