Code appears when pasted as plain text

[QQQOrange]

将添加下划线的文本复制后，以纯文本形式粘贴，会出现相关代码

Is there an existing issue for this?

• I have searched the existing issues

Can the issue be reproduced with the default theme (daylight/midnight)?

• I was able to reproduce the issue with the default theme

Could the issue be due to extensions?

• I've ruled out the possibility that the extension is causing the problem.

Describe the problem

具体代码如图
照理来说，粘贴为纯文本的话，应该只包含文字，而不包含代码

Expected result

希望早日修复

Screenshot or screen recording presentation

No response

Version environment

- Version: 3.0
- Operating System: win11
- Browser (if used):

Log file

无

More information

No response