[Bug Report] When next post form after first post. checkbox button component default value is losed

[tu6ge]

Element UI version

2.13.1

OS/Browsers version

Chrome 86.0.4240.183 ,Ubuntu 20.04

Vue version

2.6.12

Reproduction Link

https://github.com/tu6ge/laravel-form-item

Steps to reproduce

git clone git@github.com:tu6ge/laravel-form-item.git

cd laravel-form-item

git checkout element

composer install

composer test-browser

you can find CheckboxButtonTest run failed .

What is Expected?

I want to post correct data when second submit form.

What is actually happening?

But ,I post data is wrong in second submit form.

[tu6ge]

I use Element UI and Vue by script label

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[tu6ge]

The problem has not been solved