Markdown rendering is slowing down

[FreemanKevin]

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• Confirmed that it can be reproduced in built-in themes without customized css.

  If it only exists in 3rd party themes or css, you can still report it, but please attach the theme target or the css file. We may not "fix" it, if it is caused by 3rd party themes or css styles that we cannot support.

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Describe the bug
The automatic rendering speed of markdown has become much slower. It takes a complete return to complete the rendering. Normally, it will be rendered immediately after I finish writing. Basically, what you see is what you get. Now you need to return more or wait.

Also, when using the `` symbol to mark, it becomes more difficult to modify the previously marked part, and you also need to use the return to find the ` symbol behind. It was normal before.

To Reproduce
Steps to reproduce the behavior:

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

Expected behavior

Screenshots / Screencasts

Sample Markdown File
Please attach or send us hi@typora.io the sample md file that may reproduce this.

### demo title
> hello world `hello world` 你好.

Desktop (please complete the following information):
ProductName: macOS
ProductVersion: 14.4.1
BuildVersion: 23E224

Typora Version
1.9.2-dev (7184)

Additional context
Also, in the Windows environment, exporting the md format to the PDF file format cannot carry the current document theme, but there is no problem in the Mac environment, and the theme used during editing can be carried over when exporting.