Status not updating

1. I have a task list like this:
```markdown
- [x] Task 1
- [ ] Task 2
- [ ] Task 3
```
2. Check task 2 and then uncheck task 2 at frontend.
3. Update backend docsify docs to
```markdown
- [x] Task 1
- [x] Task 2
- [ ] Task 3
```
The task 2 remains unchecked until i restart docsify server.