Copy content

[qingyou730]

Description

There is a problem when copying paragraphs with carriage returns and line breaks
Selecting 'control+a' and copying will result in additional content
After getApi(). markdown. serialize(), there will be a br in the content

Reproduction URL

No response

Reproduction steps

1. Go to '...'
2. Click on '....'
3. Scroll down to '....'
4. See error

Plate version

---

Slate React version

---

Screenshots

Logs

Browsers

No response