Text ill-formed after 'c-c' (replace whole line) in vim mode and refresh

### Is this a hackmd.io issue?

- [x] Yes, the bug happens on https://hackmd.io
- [ ] No. If it's a self-hosted CodiMD instance, please fire up the issue in the repo of CodiMD: https://github.com/hackmdio/codimd

### What's the problem

Text ill-formed after 'c-c' in Vim mode and refresh page.

#### Current behaviour

Figure 1 - Before

Figure 2 - After modifying line 1

Figure 3 - Ill-formed after refresh

Provide steps to reproduce:

1. Switch to Vim mode
1. Fill in contents as in Figure 1
1. Move cursor to line 1
1. Press 'c-c' (replace whole line), line 1 will be cleared
1. Input "Changed Line1" and press Esc
Now it should look like Figure 2
1. Refresh the page by F5
1. The content went ill-formed as in Figure 3

Note link: https://hackmd.io/@yesiah/Hy54AqEJs

#### Expected behaviour

After refresh, the content should remain the same as in Figure 2.

#### Environment

I use HackMD on:

**Desktop**
- OS: Window 11
- Browser: Chrome
- Browser Version: 104.0.5112.102 (64 bits)