some problem convert the markdown text to plaintext when include " in the text

Steps to reproduce the problem (provide example Markdown if applicable):

```
你遇到过的问题是：使用xx时出现**“服务异常，请稍后重试”**的问题
```

Expected behavior:

```
你遇到过的问题是：使用xx时出现“服务异常，请稍后重试”的问题
```

Actual behavior:

```
你遇到过的问题是：使用xx时出现**“服务异常，请稍后重试”**的问题
```

(Also see what the reference implementation does: https://spec.commonmark.org/dingus/)
