表单输入一个值后，来回切换，会产生无效dom，分离的元素

[mkangm]

• I have searched the issues of this repository and believe that this is not a duplicate.

Version

4.2.6

Environment

3.5.22

Reproduction link

Steps to reproduce

下面两个vue文件，只要不输入input的内容，点击66666切换就不会产生，只要输入一次后，点击切换就产生了 无法回收

What is expected?

自动回收

What is actually happening?

表单大，切换多，浏览器崩溃