ElemeFE / ElemeFE/element

[Bug Report] el-dropdown 组件下的插槽,设置了 "#default" 属性,不显示下拉框。

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Dominant language
Vue
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Description

### Element UI version
2.15.12

### OS/Browsers version
5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/107.0.0.0 Safari/537.36 Edg/107.0.1418.52

### Vue version
2.7.14

### Reproduction Link
https://codepen.io/fanyangyang/pen/wvXjPeb

### Steps to reproduce
1、点击 “更多菜单-1” 无法显示下拉框

2、点击 “更多菜单-2” 可以显示下拉框

### What is Expected?
Vue2 具名插槽文档

https://v2.cn.vuejs.org/v2/guide/components-slots.html#%E5%85%B7%E5%90%8D%E6%8F%92%E6%A7%BD

文档中有这样一句话,一个不带 name 的 出口会带有隐含的名字“default”。

可是设置 就不会显示下拉框,如果直接是 可以正常显示。

理论情况下,应该两者都能正常显示。

### What is actually happening?
点击 “更多菜单-1” 无法显示下拉框

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