[Component] [table] 多级表头+动态显示列 不能正确显示列（第一次勾选可以正确显示，取消全部勾选后再勾选其他列时不能正确显示）

[apzs]

Bug Type: Component

Environment

• Vue Version: 3.4.21
• Element Plus Version: 2.6.3
• Browser / OS: User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/93.0.4577.63 Safari/537.36
• Build Tool: Vite

Reproduction

Related Component

• el-table

Reproduction Link

Element Plus Playground

Steps to reproduce

1. 勾选State和City，不勾选Address和Zip，点击Submit，此时可以正确显示State和City
2. 不勾选State和City，勾选Address和Zip，点击Submit，此时不能正确显示Address和Zip列，显示的是空数据

What is Expected?

取消勾选State和city，勾选Address和Zip后期望显示 Address和Zip列

What is actually happening?

实际没有显示这两列的信息

Additional comments

如下方式可以正确显示：
1、注释掉<el-table-column label="Address Info" v-if="showColumns.length">使其不嵌套，根据复现步骤可以正确显示
2、执行复现步骤第一步后，第二步保留第一步的任何列都可以正常显示（比如第二步保留City；不勾选State，勾选City、Address、Zip可以正常显示）

[github-actions]

This issue has been automatically locked since there has not been any recent activity after it was closed. Please open a new issue for related bugs.

此 issue 已被自动锁定，因为关闭后没有任何近期活动。如果有相关 bug，请重新创建一个新 issue。