vuepress
                                
                                 vuepress copied to clipboard
                                
                                    vuepress copied to clipboard
                            
                            
                            
                        The auto-sidebar config can not generate multi first-level headings but only one.
- [x] I confirm that this is an issue rather than a question.
Bug report
Markdown file has many level 1 headings, but the final rendered html only generates a first-level title.
Steps to reproduce
use vuepress auto-sidebar in config.js to generate sidebar, just like:
module.exports = {
    themeConfig: {
        sidebar: 'auto',
        ...
    }
}
then use vuepress to compile, the final rendered html only has one first-level title on sidebar.
What is expected?
The final rendered html sidebar has multiple first-level titles.
What is actually happening?
The final rendered html only has one first-level title on sidebar.
Other relevant information
- Output of npx vuepress infoin my VuePress project: