I had replaced the default md render by hexo-renderer-markdown-it. And I installed this plug-in.

Then I noticed the rended page had something what didn't hiden: <!---toc---> and <!---toc stop--->.

This issue need to configure hexo-renderer-markdown-it by set html: ture

eg.(hexo's _config.yml)

# Markdown-it config
## Docs: https://github.com/celsomiranda/hexo-renderer-markdown-it/wiki
markdown:
  render:
    html: true